When I want to work closely on little projects I zoom in to do so but every time photoshop freezes. I can still swap between tools and brushes but nothing has any effect. I can't no longer edit, undo or even save my work. I have to force quit the app and restart which usually results in the loss of whatever edits I had done before the crash. When this happens I get no error message, everything just stops. This only recently started happening, more specifically after the most recent update to photoshop mobile/iPad.