Weird position after homing with marlin 2.0

Hi,

I've been upgrading my RAMPS1.4 to an SKR V1.4 and flashed marlin2.0 on it. Configured it and was pretty content that everything still worked.
Then I executed G28 Z0 and my printer did its homing routine as expected. But afterward its always at Z-10 instead of Z0. I checked my Probe offset, but it is set to Z0 so this can't be it.
Any suggestions what this could be?