It's an optical allusion of having crooked nocks. I have already spoke with the bow owner and without a shadow of a doubt, his brace height was considerably too low when the strings came off and when the string hit the back of his wrist. This is a common mistake with the forward handle bows although I have never ever had anyone tell me that they had issues with their string coming off.
Now I have been wrong before, just not lately!
This is one of my builds, and while I'm sure it's not perfect, I know what it isn't.
BIgJim