Spaghetti after perfect first layer

Dear community,
on PEI Plate, i got spaghetti after perfect first layer. First layer is strong on PEI plate, but second layer does not fit on first layer.
I tried PLA from german vendor “Das Filament”. I see in Bambustudio temperatur on all layers in Generic PLA (i used) is 220°. The only different i see is the varius speed between first and other layer.

thanks for help
Marcel

Is this your first print or have you printed successfully before? I had a similar problem - after several perfect prints print quality began to degrade with under-extrusion, first starting at higher layers and only with certain filaments, with some prints still successful, until all prints came out under-extruded.

The problem was that filament residues hat accumulated in the hotend until it was almost fully clogged. Due to the force of the Bambu extruder it was still able to push some filaments through the clogged hotend which made the problem difficult to localize at first. I cleaned the hotend according to the instructions in the troubleshooting wiki and now it prints in perfect quality again.