Salearlyman@duk3luk3@cloudisland.nz
@Natanox@chaos.social I don't really have a great idea but I suppose it could be backlash related or X-axis droop related (if you only have one Z axis lead screw, the X-axis gantry will be drooping a little). In theory both of these should apply equally to the probe and the print head.
Salearlyman@duk3luk3@cloudisland.nz
@Natanox@chaos.social Can you clarify how the calibration works - is it just levelling compensation, or is it full ABL mesh probing? There's a whole bunch of different algorithms related to bed levelling in Marlin and I don't know which one your printer uses and whether it's modified - maybe knowing that could jog my memory.