I believe I have seen that before. It seemed to be a refresh problem as far as I could tell.

I had a problem with the progerss bar before my system suffered from an overvoltage condition, and with the new system, that went away.

Sketch runs differently from XPE. In XXP, I lock the effect and make bitmap copies. This keeps the plugin from rerunning when making a bitmap copy. Difference bewteen running from vector and bitmap , I think.

Akvis is very good at responding to problems, and you might write to them.

If I see this again, I'll make a note of what happens.

Rich