I am using 12.4 iPad Pro + the latest AR for iOS. While using the palette knife my image froze. I tried several times and still the image froze. The pad was at 32% power, the knife was set at size 40%,pressure 34, softness 42 ipencil pressure range 0% I had at the most 8 layers open. The color palette has 14 colours in use at this time while getting the freeze. I stopped my project, put the pad on charge, also the ipencil and quite for the nite. Any thoughts? Thanks