As the image shows, this seems to be a very specific bug I noticed when the skew feature was first added. It didn’t get in the way too much, so I figured it was a kink to be ironed out. It’s still there.
Selection gets stretched to infinity and then vanishes when I stop dragging.
It’s very specific, only happening when the pivot anchor is outside the right side of the selection. Left, top, and bottom sides are fine.
Recreating it is easy, just plop the pivot anchor outside on the right side of the selection bounds, and then try to skew the selection from the left side.
Aseprite version 1.3.9.2 from steam.
Windows 11 is that matters.