Paint by reference keep turning white/blank

This is really irritating me, so I play a medieval sort of game style and so I don’t use photos I use paint by reference as sort of portraits and recently realised that when they are painted they are blurry (rather than just the clear pixels it usually is) and after a while they always turn white, I saved pictures to the gallery but I mean it makes no difference really because they just end up turning white eventually! Iv repaired the game and cleared cache I don’t understand the issue.