Does your buffer do this? (second video on the first post)
https://forum.bambulab.com/t/problems-with-loading-the-filament-from-ams-to-printer/28416
Then it could be your filament buffer.
Do your spools also rewind very quickly so that the filament expand in the whole AMS until it gets back on spool and everything is knotted? > they send me an new Motherboard for the AMS and the problem is now gone.
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