Hiiiiiiiiiiiiiiii
This is my first time using Mari for textures, and I have this weird problem whenever I undo my brush stroke (just does it randomly, not all the time).
It gets rid of my mask texture(in the shader module)!!
Like everything goes blank, the texture I was working on is gone.
so I have to reset the mask texture, then load the texture again…
this happens pretty often, when I press Ctrl+Z.
really frustrating. 
Is it a glitch? Anyone had this issue before?
(I’m using Mari 1.5v1 btw)