Undo causing crashes in 15

When I use the cutter to select a fill, then delete it, then undo, TB 15 consistently crashes. I’ve restarted my computer several times, reinstalled, and created completely new files and the problem is still happening. I tested the same problem in TB 14 and I haven’t been able to replicate.

My specs are
GTX 970
16 GB Ram
Windows 10

I am having the same problem when colouring!

Update to new harmony 15.0.1, has the fix for it. It’s in your downloads when you login.