Fresh Klipper Install Has Printing Problems

hey everyone :)

i freshly installed Klipper onto my nearly new Anycubic Vyper. I'm still pretty new to 3d printing (about 1 month) and learning by doing. The Klipper installation went well, however when i start my prints, filament will flow through the nozzle during the heating process and mess up the print. I configured the Z offset correctly, but every print will mess up due to the filament.

Does anybody know what I could do about this?

Thank you very much in advance!