Color Tool Blinking

This is a glitch that has been annoying me for a while. It’s not a major glitch, but it’s big enough to bug me at the back of my head.

Whenever I color something in with my color tool it looks fine. But when I touch the prop, it starts blinking. I filmed it to show what I mean:

Is there any way to fix this?

I don’t know what causes that, but it looks fun.

Also, your “female” NPC made a rather manly groan when it died