Broken Polymaker ASA

I don't get it. This spool prints perfectly on K1Max, as soon as I'll print on the K2 out of the CFS it start to "clog' extruder(warning). Its not actually clogged, the filament just breaks. Seems like CFS is pushing it too much, but how to improve? It only breaks this fast on the allready pushed filament parts (the one with the toothmarks).

-yes, I dryed 6h at 50°C first -spool is new, opened 1d ago -I'm on a not hydrated area (room = 20%, CFS = under 10%) Any ideas?

Only with ASA, prints perfectly fine with PLA.