That happens to me to, just click the eraser then the screen and it erase it, then click the color pen again and it'll show up on the canvas that color. It's only delayed so you'll have to do that for every color. Unless you feel like just spriting with it the way it is untill it's fixed.
Don't argue with idiots because they will drag you down to their level and then beat you with experience.
By Sprite (1308)
By