Recently I am having problems with the first layer.
The plate is pretty smooth +-0.02 mm but the influence of the bed mesh is felt.
I noticed that loading the mesh does not show a shift in the nozzle.
From what I remember the effect was always seen using GET_POSITION.
Now loading or unloading the mesh shows no effect.
At a point where the mesh is -0.015 GET_POSITION does not change
kinematic: X:50.000000 Y:100.000000 Z:25.000000
toolhead: X:50.000000 Y:100.000000 Z:25.000000 E:0.000000
gcode: X:50.000000 Y:100.000000 Z:25.000000 E:0.000000
How can I test if MESH is loaded correctly?