Hi there,
I've managed to reproduce a bug that was occurring to me from time to time but didn't know how it was triggered.
If you're in Edit Mesh: Create mode, with 'Deformed' option disabled, and you're creating a new vertex while dragging it to its desired position... if you do anything that stops the vertex from moving (hovering over the Edit Mesh menu, or going to the borders of the screen), Spine crashes every time.
I'm on 3.6.35 right now, but I think this is happening from a long time ago actually.
I've recorded a video to show the issue. Here...:
Crash while dragging vertex - YouTube
Thank you.