Hi Jacques! I have the latest version. Tried again but this behaviour persist. Can you please open also an image? There is no problem if I add an "empty image" with no images (like in your gif) but the behaviour I described appears if the empy image has an image asociated (sorry for explaining myself bad). Thank you very much for your time!

It's weird because sometimes the mask is disabled, sometimes not. Could it be my PC? I will check it again later (disabling all addons and with a fresh install). Should this be closed and should I report the possible 'disable mask' bug later as a different issue? (not sure how this works, this is my second bug report). Thank you!