Interesting, have you paper Z zeroed, got a good depth, then probe Z zeroed and repeated the excess depth issue? (troubleshooting and technical problem solving technique has us theorize the problem, test the believed solution and if we have success with the new process, and then re-introduce the alleged problem to verify the fault re-appears before fixing again and verifying again that the problem had been resolved.)
Is the probe 14.99mm thick, or a different thickness?
(Ignore the rest if the probe thickness is thinner than the 14.99mm used by easel as default, cause that would explain the issue right there…)
Are you setting Z zero directly atop the place of the carve, or offset to a side/corner?
I know in the prior posts I also shared a workpiece leveling technique and discussed surfacing on the CNC.
Also did you make these measurements using the double pocket method I suggested b4?: