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Texture paint undo sometimes changes texture slot
Open, Confirmed, MediumPublic


System Information
Operating system: Windows 10
Graphics card: GTX 1060

Blender Version
Broken: 2.80 (sub 48), 2019-03-12 13:53, hash: 936014ea8c74

Short description of error
When texture painting on a particular texture slot, then undoing that painting, sometimes the selected paint slot will change.

Exact steps for others to reproduce the error
I couldn't reproduce from the default startup file, so I've stripped down the file that's having problems as much as I can.

  1. Open attached file
  2. Select paint slot "Skin mask" from either topbar or properties panel.
  3. Paint some strokes on the model or image editor
  4. Press Ctrl-Z
  5. Notice the paint slot is no longer set to "Skin mask"