Is it possible to trigger on an incoming phone call?

oh this one: Unexpected inconsistency in OCR

Nope.

But I found my analysis here:

My memory was faulty. The Find Image action was always a little bit faster than Find Image, but not very much if the area being searched is small. I'm a big fan of Apple's OCR, so for a window as small as FaceTime's alert, I would myself use OCR instead of Find Image.