Layer lines worse with smaller layer height.

Calibrated E steps, bed is level, Z calibration is bang on.

B Tried different filaments with same result

Black asa printed at 255, Bed at 90, in an enclosure. No fan. Adaptive layer height turned on, 0.12mm otherwise. 15% infill

Doesn't do it nearly as bad at 0.2mm, trying 0.3mm height with 0.4mm nozzle now. Turned down flow to 98% and no improvement either.