diff --git a/services/surfaceflinger/CompositionEngine/include/compositionengine/impl/planner/LayerState.h b/services/surfaceflinger/CompositionEngine/include/compositionengine/impl/planner/LayerState.h
index ce2b96f..1f241b0 100644
--- a/services/surfaceflinger/CompositionEngine/include/compositionengine/impl/planner/LayerState.h
+++ b/services/surfaceflinger/CompositionEngine/include/compositionengine/impl/planner/LayerState.h
@@ -227,6 +227,7 @@
     // Returns the bit-set of differing fields between this LayerState and another LayerState.
     // This bit-set is based on NonUniqueFields only, and excludes GraphicBuffers.
     ftl::Flags<LayerStateField> getDifferingFields(const LayerState& other) const;
+    bool isSourceCropSizeEqual(const LayerState& other) const;
 
     compositionengine::OutputLayer* getOutputLayer() const { return mOutputLayer; }
     int32_t getId() const { return mId.get(); }
diff --git a/services/surfaceflinger/CompositionEngine/src/planner/Flattener.cpp b/services/surfaceflinger/CompositionEngine/src/planner/Flattener.cpp
index 13b6307..a18397d 100644
--- a/services/surfaceflinger/CompositionEngine/src/planner/Flattener.cpp
+++ b/services/surfaceflinger/CompositionEngine/src/planner/Flattener.cpp
@@ -20,6 +20,7 @@
 #define ATRACE_TAG ATRACE_TAG_GRAPHICS
 
 #include <android-base/properties.h>
+#include <common/FlagManager.h>
 #include <compositionengine/impl/planner/Flattener.h>
 #include <compositionengine/impl/planner/LayerState.h>
 
@@ -50,8 +51,19 @@
     for (size_t i = 0; i < incomingLayers.size(); i++) {
         // Checking the IDs here is very strict, but we do this as otherwise we may mistakenly try
         // to access destroyed OutputLayers later on.
-        if (incomingLayers[i]->getId() != existingLayers[i]->getId() ||
-            incomingLayers[i]->getDifferingFields(*(existingLayers[i])) != LayerStateField::None) {
+        if (incomingLayers[i]->getId() != existingLayers[i]->getId()) {
+            return false;
+        }
+
+        // Do not unflatten if source crop is only moved.
+        if (FlagManager::getInstance().cache_if_source_crop_layer_only_moved() &&
+            incomingLayers[i]->isSourceCropSizeEqual(*(existingLayers[i])) &&
+            incomingLayers[i]->getDifferingFields(*(existingLayers[i])) ==
+                    LayerStateField::SourceCrop) {
+            continue;
+        }
+
+        if (incomingLayers[i]->getDifferingFields(*(existingLayers[i])) != LayerStateField::None) {
             return false;
         }
     }
diff --git a/services/surfaceflinger/CompositionEngine/src/planner/LayerState.cpp b/services/surfaceflinger/CompositionEngine/src/planner/LayerState.cpp
index 8dab6ce..0e3fdbb 100644
--- a/services/surfaceflinger/CompositionEngine/src/planner/LayerState.cpp
+++ b/services/surfaceflinger/CompositionEngine/src/planner/LayerState.cpp
@@ -76,6 +76,11 @@
     return hash;
 }
 
+bool LayerState::isSourceCropSizeEqual(const LayerState& other) const {
+    return mSourceCrop.get().getWidth() == other.mSourceCrop.get().getWidth() &&
+            mSourceCrop.get().getHeight() == other.mSourceCrop.get().getHeight();
+}
+
 ftl::Flags<LayerStateField> LayerState::getDifferingFields(const LayerState& other) const {
     ftl::Flags<LayerStateField> differences;
     auto myFields = getNonUniqueFields();
diff --git a/services/surfaceflinger/CompositionEngine/tests/planner/FlattenerTest.cpp b/services/surfaceflinger/CompositionEngine/tests/planner/FlattenerTest.cpp
index d9318af..763b998 100644
--- a/services/surfaceflinger/CompositionEngine/tests/planner/FlattenerTest.cpp
+++ b/services/surfaceflinger/CompositionEngine/tests/planner/FlattenerTest.cpp
@@ -14,6 +14,9 @@
  * limitations under the License.
  */
 
+#include <common/include/common/test/FlagUtils.h>
+#include "com_android_graphics_surfaceflinger_flags.h"
+
 #include <compositionengine/impl/OutputCompositionState.h>
 #include <compositionengine/impl/planner/CachedSet.h>
 #include <compositionengine/impl/planner/Flattener.h>
@@ -239,6 +242,30 @@
     expectAllLayersFlattened(layers);
 }
 
+TEST_F(FlattenerTest, unflattenLayers_onlySourceCropMoved) {
+    SET_FLAG_FOR_TEST(com::android::graphics::surfaceflinger::flags::
+                              cache_if_source_crop_layer_only_moved,
+                      true);
+
+    auto& layerState1 = mTestLayers[0]->layerState;
+    auto& layerState2 = mTestLayers[1]->layerState;
+
+    const std::vector<const LayerState*> layers = {
+            layerState1.get(),
+            layerState2.get(),
+    };
+
+    initializeFlattener(layers);
+
+    mTestLayers[0]->outputLayerCompositionState.sourceCrop = FloatRect{0.f, 0.f, 100.f, 100.f};
+    mTestLayers[1]->outputLayerCompositionState.sourceCrop = FloatRect{8.f, 16.f, 108.f, 116.f};
+
+    // only source crop is moved, so no flatten
+    EXPECT_EQ(getNonBufferHash(layers),
+              mFlattener->flattenLayers(layers, getNonBufferHash(layers), mTime));
+    mFlattener->renderCachedSets(mOutputState, std::nullopt, true);
+}
+
 TEST_F(FlattenerTest, flattenLayers_basicFlatten) {
     auto& layerState1 = mTestLayers[0]->layerState;
     auto& layerState2 = mTestLayers[1]->layerState;
diff --git a/services/surfaceflinger/common/FlagManager.cpp b/services/surfaceflinger/common/FlagManager.cpp
index 35dd428..a582232 100644
--- a/services/surfaceflinger/common/FlagManager.cpp
+++ b/services/surfaceflinger/common/FlagManager.cpp
@@ -122,6 +122,7 @@
     DUMP_READ_ONLY_FLAG(multithreaded_present);
     DUMP_READ_ONLY_FLAG(add_sf_skipped_frames_to_trace);
     DUMP_READ_ONLY_FLAG(use_known_refresh_rate_for_fps_consistency);
+    DUMP_READ_ONLY_FLAG(cache_if_source_crop_layer_only_moved);
 
 #undef DUMP_READ_ONLY_FLAG
 #undef DUMP_SERVER_FLAG
@@ -192,6 +193,8 @@
 FLAG_MANAGER_READ_ONLY_FLAG(multithreaded_present, "debug.sf.multithreaded_present")
 FLAG_MANAGER_READ_ONLY_FLAG(add_sf_skipped_frames_to_trace, "")
 FLAG_MANAGER_READ_ONLY_FLAG(use_known_refresh_rate_for_fps_consistency, "")
+FLAG_MANAGER_READ_ONLY_FLAG(cache_if_source_crop_layer_only_moved,
+                            "debug.sf.cache_source_crop_only_moved")
 
 /// Trunk stable server flags ///
 FLAG_MANAGER_SERVER_FLAG(late_boot_misc2, "")
diff --git a/services/surfaceflinger/common/include/common/FlagManager.h b/services/surfaceflinger/common/include/common/FlagManager.h
index 6d5846a..15ca345 100644
--- a/services/surfaceflinger/common/include/common/FlagManager.h
+++ b/services/surfaceflinger/common/include/common/FlagManager.h
@@ -61,6 +61,7 @@
     bool multithreaded_present() const;
     bool add_sf_skipped_frames_to_trace() const;
     bool use_known_refresh_rate_for_fps_consistency() const;
+    bool cache_if_source_crop_layer_only_moved() const;
 
 protected:
     // overridden for unit tests
diff --git a/services/surfaceflinger/surfaceflinger_flags.aconfig b/services/surfaceflinger/surfaceflinger_flags.aconfig
index c125791..3fb763e 100644
--- a/services/surfaceflinger/surfaceflinger_flags.aconfig
+++ b/services/surfaceflinger/surfaceflinger_flags.aconfig
@@ -92,3 +92,11 @@
   bug: "299201319"
   is_fixed_read_only: true
 }
+
+flag {
+  name: "cache_if_source_crop_layer_only_moved"
+  namespace: "core_graphics"
+  description: "do not flatten layers if source crop is only moved"
+  bug: "305718400"
+  is_fixed_read_only: true
+}