Not sure if you have the same problem but I seem to be getting constant 1.0 mm measurement for the whole surface measure grid. I mean importing measurement points to warp table give me just dead exact 1.000 Z offsets for the whole grid.
It's been over a year since I used my router last time and now updated the TNG and MK3eco firmware so this is a new issue. There's been bugs in warp feature earlier but the response from support was, lets say not that friendly so not too keen to raise questions through that route as this may be some new thing that I've setup wrong.