Hi All,
Sorry, I'm not 100% sure how to properly word this, as I've not nailed down exactly what causes this to occur, but I've had a persistent albeit random issue trying to paint masks. Eventually, after doing a fair mount of painting/switching back and forth between black/white using the keyboard shortcut something happens and AP gets 'stuck'.
Once the issue starts, white and black do the same thing and resetting the colors does not fix the issue. If they are stuck in 'hide mode' both colors hide and vice versa. I can save and restart, but the issue persists. However, sometimes, if I manually set the color to white/black the problem goes away, but that is not a guaranteed fix.
I did just find that if I set both colors to nothing (red line though the circle) then manually change the slider for each color, one to white and one to black, it seemed to fix the issue. I'm fairly sure I've done that before and it did not fix the issue, but it's late and my memory is slipping.
Hopefully someone else can replicate the issue, or tell me why it's happening, and how to never let it happen again
System:
Window 10 Pro: Version 2004, Build 19041.508
Affinity Photo: 1.8.5.703