This behaviour of moving envelopes and items seperately while dragging feels super broken when using a mouse modifier that ignores envelope type. (Especially when zoomed out and operating on multiple envelopes, the user is more likely to move things somewhere they didn't intend to) Dragging areas should move what is being dragged without changing the shape of the selection. (You can also see a bug in the GIF where it leaves random envelope points around without releasing the drag, on the top track)