Just went out to shoot some. First time it's been fired since sometime during deer season. 9 arrows shot fine, knocked the 10th and my peep was all cockeyed. I'm unaware of anything that happened prior to the 10th arrow. Never had an issue since I've owned the bow.

What gives?

What bow are you using? If it has string dampers make sure they are all still on the strings.

Switchback. Nothing appears to be missing.