AMS 2 Slot 1-4 Filament stops infront Hub

Hi,

i have, again, the Problem, my second AMS wont work. I choose a Filament, start the Print, the Printer want the Filament, it stucks by the Hub and push and pull it 6 times. After i get the “cant pull filament” 0700 8006 error.

I already opened all, changed the Hub Port, checked all tubes. All is free. AMS 1 and 3 works fine. The Filament get ~8cm in the hub before the ams pull it back.

how can i solve this problem?

Thanks