didn't know kubota made balers but on our deere balers chain tension was critical. same thing on harvesters, chain tensions are crucial for proper operation.
too loose and chain can climb under sprocket and overtighten until it breaks. too tight it can stretch and break. are your tensioners or tension adjustments in spec and operate smoothly without binding? do spockets spin freely, no bearings or bushings seized? assuming specs require balanced tension on both sides of the follower, are they even? imbalanced chain tension may be causing binding on one side of the follower.
if you have one or can borrow one, can you fit a compact camera like a go-pro in there to catch it happening? some of my guys at work would do that to see an event on machinery otherwise not visible.
hope that helps or sparks a hint, good luck!
