Weird behaviour: dragging alias onto itself clears it

How to reproduce:

  1. Insert any note into a track.

  2. Create an alias to this block in the pattern matrix.

  3. Drag this alias-block in the pattern matrix onto itself in the same column.

Expected behaviour:

Alias remains intact (dragging a non-alias block onto itself doesn’t have the same effect).

Actual behaviour:

Alias-block gets deleted along with notes inside it.