Hello,
I am a committed playmaker user, I have a repeating issue, on many Unity version as well. The issue is a blinking Unity editor interface windows and text fields. It happens when I select an object with FSM on it. It won't happen on a clean project but at some point in working at starts. It happens on many projects of mine. I learned to live with it, but it's very annoying and I hope you aware of this issue and might have a solution.