[mini] drag and drop: fix scroll disorientation after drop (#67405)

Co-authored-by: ellatrix <[email protected]>
Co-authored-by: talldan <[email protected]>

packages/block-editor/src/components/use-moving-animation/index.js

@@ -52,6 +52,7 @@ function useMovingAnimation( { triggerAnimationOnChange, clientId } ) {
 		isFirstMultiSelectedBlock,
 		isBlockMultiSelected,
 		isAncestorMultiSelected,
+		isDraggingBlocks,
 	} = useSelect( blockEditorStore );
 
 	// Whenever the trigger changes, we need to take a snapshot of the current
@@ -85,6 +86,11 @@ function useMovingAnimation( { triggerAnimationOnChange, clientId } ) {
 			}
 		}
 
+		// Neither animate nor scroll.
+		if ( isDraggingBlocks() ) {
+			return;
+		}
+
 		// We disable the animation if the user has a preference for reduced
 		// motion, if the user is typing (insertion by Enter), or if the block
 		// count exceeds the threshold (insertion caused all the blocks that
@@ -153,6 +159,7 @@ function useMovingAnimation( { triggerAnimationOnChange, clientId } ) {
 		isFirstMultiSelectedBlock,
 		isBlockMultiSelected,
 		isAncestorMultiSelected,
+		isDraggingBlocks,
 	] );
 
 	return ref;