Nope, I can tell just by looking nock area compromised.Did you try a new nock to make certain your old nock wasn't slipping?
So folks understand. If you do decide to check, don’t try and put lot of side pressure on bolt nock on string. If you do you may ruin your nocking point on string.Thanks for posting that video Riflenut. I'll be watching for loose nocks moving lateral movement.