Hi Nate,
I'm having this issue too (Spine 1.9.15), but I never reported it. I used to edit my skeletons on windows so I don't have this issue ๐
But I've to work on Mac for the coming month, so it would be nice if you could do something about this now.
The issue seems to occur only for european keyboards (azerty I mean).
If I use CMD-W, it's correctly doing an undo ('W' on an azerty kbd is physically placed where the 'Z' is placed on a qwerty one), but it's not practical.
Is there something you can do about this issue?
Thanks,
Chris