567 John Deere baler twine issue

I own a 567 John Deere baler, love the baler, but every bale I make this year is loose on the left side or when the tie arms return to the home side. The right side is beautifully nice and tight but it progressively gets more and more loose as it works it's way across. Checked my twine tensioner and tie arms. Everything is in working order. Any help is much lyrics appreciated

567 John Deere baler twine issue