P: Perspective Warp is broken.

Today i need to edit the Perspective Warp that has been applied to 50 Linked Smart Objects and I'm unable to do so in Win10. When i try to edit an edge of the PW, my image transforms in completely unexpected ways and when i finally do manage to move a node, my framerate drops down to 1fps or less.

There are no workarounds and the tool is totally broken.

Here's a quick screencap showing the main issue, but there are many other problems too.
https://www.loom.com/share/23f640a12abc4537955612985b76e399