System Information
Blender Version
2.81 estable version
Short description of error
when editing masks in movie clip editor, any change you do is not undoable. Undo button doesn't works in this section of blender
Exact steps for others to reproduce the error
- open a new blender file
- go to movie clip editor and select mask editor option
- start creating mask, any edition you do from here is not undoable