Im using xiaomi redmi 6
Every second time I use a brush to paint using any tool to my canvas. There is a glitch where a big white square will erase portion of my sketches. The only way i can remove the white square is to touch it to paint a dot on it and its gone and the normal sketch will be back, or another way is to undo everytime the error occurs. This is annoying bcoz every second time I touch the canvas with brush, there will be white square interfering and i need to undo to remove it. Thanks for kind answers