Deere 567 twine arm issue

Hopefully someone here can help as this is becoming quite aggravating! Baler is a 567 with 12,000 bales on the counter. Twine only no net.
Bale reaches full size, monitor gives long beep and twine arms extend like normal. They make the end wraps on right side then start to travel across. This is where the problem occurs, for some reason they speed up and travel about half way across the bale then go back to normal and make left side end wraps.
I have loosened twine tension and it seems to help a little but still does it occasionally with tension backed all the way off. I'm using Tytan 110-20,000' balls.
BTW a neighbor has exact same baler and his does same thing. Any ideas?

Deere 567 twine arm issue