I tried to run a bed mesh today and the results are different every time. Every time I ran the probe I got new numbers. They seemed to be trending UP but my bed had been at temp well over an hour before this. I kept it at temp for the next 30 - 45 minutes playing with the bed calibrate button.

I watched the bed go from 0.1 mm to 0.73 mm without physically touching the printer. They didn't all raise quite the same amount but stayed pretty even. The range only grew from ~.65 to ~1.05 over all these tests.

Specs

Ender 3 Pro
Klipper firmware
Dual Z rod
Sprite hot end
CR touch