diff --git a/aosp/boot_control_android.cc b/aosp/boot_control_android.cc
index 3b20fc2..c1ac0d4 100644
--- a/aosp/boot_control_android.cc
+++ b/aosp/boot_control_android.cc
@@ -67,7 +67,8 @@
 
   LOG(INFO) << "Loaded boot control hidl hal.";
 
-  dynamic_control_ = std::make_unique<DynamicPartitionControlAndroid>();
+  dynamic_control_ =
+      std::make_unique<DynamicPartitionControlAndroid>(GetCurrentSlot());
 
   return true;
 }
diff --git a/aosp/dynamic_partition_control_android.cc b/aosp/dynamic_partition_control_android.cc
index aba6deb..4220445 100644
--- a/aosp/dynamic_partition_control_android.cc
+++ b/aosp/dynamic_partition_control_android.cc
@@ -116,12 +116,14 @@
   return FeatureFlag(FeatureFlag::Value::NONE);
 }
 
-DynamicPartitionControlAndroid::DynamicPartitionControlAndroid()
+DynamicPartitionControlAndroid::DynamicPartitionControlAndroid(
+    uint32_t source_slot)
     : dynamic_partitions_(
           GetFeatureFlag(kUseDynamicPartitions, kRetrfoitDynamicPartitions)),
       virtual_ab_(GetFeatureFlag(kVirtualAbEnabled, kVirtualAbRetrofit)),
       virtual_ab_compression_(GetFeatureFlag(kVirtualAbCompressionEnabled,
-                                             kVirtualAbCompressionRetrofit)) {
+                                             kVirtualAbCompressionRetrofit)),
+      source_slot_(source_slot) {
   if (GetVirtualAbFeatureFlag().IsEnabled()) {
     snapshot_ = SnapshotManager::New();
   } else {
@@ -1019,8 +1021,8 @@
   // target slot.
   const auto& partition_name_suffix =
       partition_name + SlotSuffixForSlotNumber(slot);
-  if (UpdateUsesSnapshotCompression() && IsDynamicPartition(partition_name) &&
-      slot != current_slot) {
+  if (UpdateUsesSnapshotCompression() && slot != current_slot &&
+      IsDynamicPartition(partition_name, slot)) {
     return {
         {.mountable_device_path = base::FilePath{std::string{VABC_DEVICE_DIR}}
                                       .Append(partition_name_suffix)
@@ -1211,6 +1213,14 @@
     uint32_t slot,
     uint32_t current_slot,
     std::vector<std::string>* partitions) {
+  CHECK(slot == source_slot_ || target_slot_ != UINT32_MAX)
+      << " source slot: " << source_slot_ << " target slot: " << target_slot_
+      << " slot: " << slot
+      << " attempting to query dynamic partition metadata for target slot "
+         "before PreparePartitionForUpdate() is called. The "
+         "metadata in target slot isn't valid until "
+         "PreparePartitionForUpdate() is called, contining execution would "
+         "likely cause problems.";
   bool slot_enables_dynamic_partitions =
       GetDynamicPartitionsFeatureFlag().IsEnabled();
   // Check if the target slot has dynamic partitions, this may happen when
@@ -1347,16 +1357,22 @@
 }
 
 bool DynamicPartitionControlAndroid::IsDynamicPartition(
-    const std::string& partition_name) {
-  if (dynamic_partition_list_.empty() &&
+    const std::string& partition_name, uint32_t slot) {
+  if (slot >= dynamic_partition_list_.size()) {
+    LOG(ERROR) << "Seeing unexpected slot # " << slot << " currently assuming "
+               << dynamic_partition_list_.size() << " slots";
+    return false;
+  }
+  auto& dynamic_partition_list = dynamic_partition_list_[slot];
+  if (dynamic_partition_list.empty() &&
       GetDynamicPartitionsFeatureFlag().IsEnabled()) {
     // Use the DAP config of the target slot.
     CHECK(ListDynamicPartitionsForSlot(
-        target_slot_, source_slot_, &dynamic_partition_list_));
+        slot, source_slot_, &dynamic_partition_list));
   }
-  return std::find(dynamic_partition_list_.begin(),
-                   dynamic_partition_list_.end(),
-                   partition_name) != dynamic_partition_list_.end();
+  return std::find(dynamic_partition_list.begin(),
+                   dynamic_partition_list.end(),
+                   partition_name) != dynamic_partition_list.end();
 }
 
 bool DynamicPartitionControlAndroid::UpdateUsesSnapshotCompression() {
diff --git a/aosp/dynamic_partition_control_android.h b/aosp/dynamic_partition_control_android.h
index a23827b..4e75a9b 100644
--- a/aosp/dynamic_partition_control_android.h
+++ b/aosp/dynamic_partition_control_android.h
@@ -38,7 +38,7 @@
   // Per earlier discussion with VAB team, this directory is unlikely to change.
   // So we declare it as a constant here.
   static constexpr std::string_view VABC_DEVICE_DIR = "/dev/block/mapper/";
-  DynamicPartitionControlAndroid();
+  explicit DynamicPartitionControlAndroid(uint32_t source_slot);
   ~DynamicPartitionControlAndroid();
 
   FeatureFlag GetDynamicPartitionsFeatureFlag() override;
@@ -110,7 +110,7 @@
 
   bool UnmapAllPartitions() override;
 
-  bool IsDynamicPartition(const std::string& part_name) override;
+  bool IsDynamicPartition(const std::string& part_name, uint32_t slot) override;
 
   bool UpdateUsesSnapshotCompression() override;
 
@@ -329,7 +329,7 @@
 
   uint32_t source_slot_ = UINT32_MAX;
   uint32_t target_slot_ = UINT32_MAX;
-  std::vector<std::string> dynamic_partition_list_;
+  std::vector<std::vector<std::string>> dynamic_partition_list_{2UL};
 
   DISALLOW_COPY_AND_ASSIGN(DynamicPartitionControlAndroid);
 };
diff --git a/aosp/dynamic_partition_control_android_unittest.cc b/aosp/dynamic_partition_control_android_unittest.cc
index 4a12b83..eb3f60c 100644
--- a/aosp/dynamic_partition_control_android_unittest.cc
+++ b/aosp/dynamic_partition_control_android_unittest.cc
@@ -402,7 +402,8 @@
       .WillByDefault(Return(FeatureFlag(FeatureFlag::Value::NONE)));
   ON_CALL(dynamicControl(), UpdateUsesSnapshotCompression())
       .WillByDefault(Return(false));
-  ON_CALL(dynamicControl(), IsDynamicPartition(_)).WillByDefault(Return(true));
+  ON_CALL(dynamicControl(), IsDynamicPartition(_, _))
+      .WillByDefault(Return(true));
 
   EXPECT_CALL(dynamicControl(),
               DeviceExists(AnyOf(GetDevice(S("vendor")),
@@ -442,7 +443,7 @@
       .WillByDefault(Return(FeatureFlag(FeatureFlag::Value::LAUNCH)));
   ON_CALL(dynamicControl(), UpdateUsesSnapshotCompression())
       .WillByDefault(Return(true));
-  EXPECT_CALL(dynamicControl(), IsDynamicPartition(_))
+  EXPECT_CALL(dynamicControl(), IsDynamicPartition(_, _))
       .Times(AtLeast(1))
       .WillRepeatedly(Return(true));
 
diff --git a/aosp/mock_dynamic_partition_control_android.h b/aosp/mock_dynamic_partition_control_android.h
index 682ddfd..d80dfb5 100644
--- a/aosp/mock_dynamic_partition_control_android.h
+++ b/aosp/mock_dynamic_partition_control_android.h
@@ -35,6 +35,8 @@
 class MockDynamicPartitionControlAndroid
     : public DynamicPartitionControlAndroid {
  public:
+  MockDynamicPartitionControlAndroid()
+      : DynamicPartitionControlAndroid(0 /*source slot*/) {}
   MOCK_METHOD(
       bool,
       MapPartitionOnDeviceMapper,
@@ -100,7 +102,10 @@
               (override));
   MOCK_METHOD(bool, MapAllPartitions, (), (override));
   MOCK_METHOD(bool, UnmapAllPartitions, (), (override));
-  MOCK_METHOD(bool, IsDynamicPartition, (const std::string&), (override));
+  MOCK_METHOD(bool,
+              IsDynamicPartition,
+              (const std::string&, uint32_t slot),
+              (override));
   MOCK_METHOD(bool, UpdateUsesSnapshotCompression, (), (override));
 
   void set_fake_mapped_devices(const std::set<std::string>& fake) override {
diff --git a/common/dynamic_partition_control_interface.h b/common/dynamic_partition_control_interface.h
index 8b29c3b..da27932 100644
--- a/common/dynamic_partition_control_interface.h
+++ b/common/dynamic_partition_control_interface.h
@@ -170,7 +170,8 @@
       const std::optional<std::string>&,
       bool is_append = false) = 0;
 
-  virtual bool IsDynamicPartition(const std::string& part_name) = 0;
+  virtual bool IsDynamicPartition(const std::string& part_name,
+                                  uint32_t slot) = 0;
 
   // Create virtual block devices for all partitions.
   virtual bool MapAllPartitions() = 0;
diff --git a/common/dynamic_partition_control_stub.cc b/common/dynamic_partition_control_stub.cc
index 7d0ef18..05803fe 100644
--- a/common/dynamic_partition_control_stub.cc
+++ b/common/dynamic_partition_control_stub.cc
@@ -114,7 +114,7 @@
 }
 
 bool DynamicPartitionControlStub::IsDynamicPartition(
-    const std::string& part_name) {
+    const std::string& part_name, uint32_t slot) {
   return false;
 }
 
diff --git a/common/dynamic_partition_control_stub.h b/common/dynamic_partition_control_stub.h
index 5ab82f5..eb7154c 100644
--- a/common/dynamic_partition_control_stub.h
+++ b/common/dynamic_partition_control_stub.h
@@ -71,7 +71,7 @@
   bool MapAllPartitions() override;
   bool UnmapAllPartitions() override;
 
-  bool IsDynamicPartition(const std::string& part_name) override;
+  bool IsDynamicPartition(const std::string& part_name, uint32_t slot) override;
   bool UpdateUsesSnapshotCompression() override;
 };
 }  // namespace chromeos_update_engine
diff --git a/common/mock_dynamic_partition_control.h b/common/mock_dynamic_partition_control.h
index 74f4efc..391d3eb 100644
--- a/common/mock_dynamic_partition_control.h
+++ b/common/mock_dynamic_partition_control.h
@@ -79,7 +79,10 @@
               VerifyExtentsForUntouchedPartitions,
               (uint32_t, uint32_t, const std::vector<std::string>&),
               (override));
-  MOCK_METHOD(bool, IsDynamicPartition, (const std::string&), (override));
+  MOCK_METHOD(bool,
+              IsDynamicPartition,
+              (const std::string&, uint32_t slot),
+              (override));
   MOCK_METHOD(bool, UpdateUsesSnapshotCompression, (), (override));
 };
 
diff --git a/payload_consumer/delta_performer.cc b/payload_consumer/delta_performer.cc
index f26dd48..82e589e 100644
--- a/payload_consumer/delta_performer.cc
+++ b/payload_consumer/delta_performer.cc
@@ -240,13 +240,13 @@
   const InstallPlan::Partition& install_part =
       install_plan_->partitions[num_previous_partitions + current_partition_];
   auto dynamic_control = boot_control_->GetDynamicPartitionControl();
-  partition_writer_ =
-      CreatePartitionWriter(partition,
-                            install_part,
-                            dynamic_control,
-                            block_size_,
-                            interactive_,
-                            IsDynamicPartition(install_part.name));
+  partition_writer_ = CreatePartitionWriter(
+      partition,
+      install_part,
+      dynamic_control,
+      block_size_,
+      interactive_,
+      IsDynamicPartition(install_part.name, install_plan_->target_slot));
   // Open source fds if we have a delta payload, or for partitions in the
   // partial update.
   bool source_may_exist = manifest_.partial_update() ||
@@ -1520,9 +1520,10 @@
   return true;
 }
 
-bool DeltaPerformer::IsDynamicPartition(const std::string& part_name) {
+bool DeltaPerformer::IsDynamicPartition(const std::string& part_name,
+                                        uint32_t slot) {
   return boot_control_->GetDynamicPartitionControl()->IsDynamicPartition(
-      part_name);
+      part_name, slot);
 }
 
 std::unique_ptr<PartitionWriter> DeltaPerformer::CreatePartitionWriter(
@@ -1538,7 +1539,7 @@
       dynamic_control,
       block_size_,
       interactive_,
-      IsDynamicPartition(install_part.name));
+      IsDynamicPartition(install_part.name, install_plan_->target_slot));
 }
 
 }  // namespace chromeos_update_engine
diff --git a/payload_consumer/delta_performer.h b/payload_consumer/delta_performer.h
index 31fa6b2..c54316b 100644
--- a/payload_consumer/delta_performer.h
+++ b/payload_consumer/delta_performer.h
@@ -325,7 +325,7 @@
   ErrorCode CheckTimestampError() const;
 
   // Check if partition `part_name` is a dynamic partition.
-  bool IsDynamicPartition(const std::string& part_name);
+  bool IsDynamicPartition(const std::string& part_name, uint32_t slot);
 
   // Update Engine preference store.
   PrefsInterface* prefs_;
diff --git a/payload_consumer/filesystem_verifier_action.cc b/payload_consumer/filesystem_verifier_action.cc
index e3a3e34..9221caa 100644
--- a/payload_consumer/filesystem_verifier_action.cc
+++ b/payload_consumer/filesystem_verifier_action.cc
@@ -168,8 +168,9 @@
             << partition.name << ") on device " << part_path;
   auto success = false;
   if (dynamic_control_->UpdateUsesSnapshotCompression() &&
-      dynamic_control_->IsDynamicPartition(partition.name) &&
-      verifier_step_ == VerifierStep::kVerifyTargetHash) {
+      verifier_step_ == VerifierStep::kVerifyTargetHash &&
+      dynamic_control_->IsDynamicPartition(partition.name,
+                                           install_plan_.target_slot)) {
     success = InitializeFdVABC();
   } else {
     if (part_path.empty()) {
diff --git a/payload_consumer/filesystem_verifier_action_unittest.cc b/payload_consumer/filesystem_verifier_action_unittest.cc
index d163ec2..f618626 100644
--- a/payload_consumer/filesystem_verifier_action_unittest.cc
+++ b/payload_consumer/filesystem_verifier_action_unittest.cc
@@ -419,7 +419,7 @@
       .WillByDefault(Return(true));
   ON_CALL(dynamic_control, OpenCowReader(_, _, _))
       .WillByDefault(Return(nullptr));
-  ON_CALL(dynamic_control, IsDynamicPartition(part.name))
+  ON_CALL(dynamic_control, IsDynamicPartition(part.name, _))
       .WillByDefault(Return(true));
 
   EXPECT_CALL(dynamic_control, UpdateUsesSnapshotCompression())