patch 7.4.2188
Problem:    Completion does not work properly with some plugins.
Solution:   Revert the part related to typing CTRL-E. (closes #972)
diff --git a/src/edit.c b/src/edit.c
index 6dae4a0..2281232 100644
--- a/src/edit.c
+++ b/src/edit.c
@@ -3893,7 +3893,7 @@
 
 	    /* CTRL-E means completion is Ended, go back to the typed text.
 	     * but only do this, if the Popup is still visible */
-	    if (c == Ctrl_E && pum_visible())
+	    if (c == Ctrl_E)
 	    {
 		ins_compl_delete();
 		if (compl_leader != NULL)