Ok it’s fixed.
PTFE tube helped a bit.
Combined with a clean-up of the extruder fixed it.
So i guess it was a mix of both. What i think was happening: there was a “rebound” on the filament. PTFE was a bit pinched and extruder was dirty so filament was slipping somehow …
There still some small anomalies looking closer… I’ll tweek the speed and see if it helps.
