Im using IpadOS 13.2.3, ArtStudio Pro 2.3.10 and when i use liquify, at random the canvas blinks black and everything i did in the liquify plugin vanishes, goes back to normal and i cant use the tool anymore, nothing works, i have to cancel and try again, losing the changed... the canvas also blinks black for a second at random, while drawing or while idle, i have no idea whats going on but it is super annoying...
Edit, just got the bug again while i was doing a stroke... the canvas blinked to black and the stroke got erased... it's almost impossible using the app without fearing losing something :S
Edit, ended up installing the beta version, 0 issues so far, maybe is something you added in the last update?
nvm, also happens on beta... maybe is not compatible with ios 13.2.3?