UCCNC and the M.Zero option. Is it a bug??

Today I tested the M.Zero option thinking this would speedup my CNC job as it moves the tool quickly to the left front. It does.

Great... However it DOES reset the X, Y (and I believe the Z) coordinates to 0 too! (like the Zero all command!).

Project was binned because of this (lost the home coordinates, and noticed to late during the job).

I have tested this M.Zero option several times with same results, however M.Center and M.Back does not reset the home coordinates!

Anyone here who know if it is supposed to do this, or if it is a bug?