@CookieHunter said in BLTouch create weird bumps in mesh:

G31 X-21 Y-54 Z1.023 P25

I’d say it was because of the large Y offset of the probe and small rocking of the X carriage is being amplified by the offset. Try to mount the probe closer to the nozzle, preferably in line in X, so the Y offset is 0.

Ian