Progress is lost on undo after exiting

[jlampel]

If you continue an existing retopology with RetopoFlow 3 and then undo in Blender as soon as you exit, you can permanently lose your progress. Interestingly, this does not happen when you start a new retopology from scratch, so there must be something we can push to the undo stack that saves the state. Possibly a toggle of Edit Mode?

[jfranmatheu]

Interesting behaviour, would be worth it to look if some user reported something similar. I remember issues of users losing geometry or undo related issues.

[jlampel]

Yeah, this was originally reported by a user on Blender Market, and I can confirm that it happens on my end too. I vaguely remember seeing something similar and was surprised it wasn't already an open issue.