If no Bed Mesh, it uses Z endstop height as Zero Position

[maxime-granger]

For the past few weeks, if my print does not have a bed mesh it uses the the Z-Endstop height as the zero position.
Not sure if it is an issue or me not setting it up correctly.
I have used bed-position argument withing [calibrate_z] but I get an error message.
Then I used bed_xy_position: argument, without any success.

What I don't understand is even if a bed mesh is not performed it probes in the middle of the print area but still uses the value from the z-Endstop

If you could direct me in the correct direction, it would very appreciated.

Thank you.