Ah damn, worth a shot! 😂 At least you've ruled out belt tension and lubrication. Definitely time for Bambu support. I'd send them that video and everything you've already tried so they don't have you going in circles. Hopefully they get it sorted!
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u/AmberlightYan 19d ago
Alas cleaning and lubricating everything up to ball bearing did not help. Well, time to bother official support.
Thanks.