homing problem with z when issuing just a home x or home y command

[xanderphillips]

To repro:
issue G28 X or G28 Y repeatedly without issuing a G28 Z or a home all command.
Each time the bed will drop by 20 and printer still thinks bed is at 0.

[Slipperyclock]

I have had the same issue with mine. Newly built LDO V0.2 S1, ran fine for a little while then all of a sudden this problem came up. I had to remove the "Z20" from line 492, https://github.com/MotorDynamicsLab/LDOVoron0/blob/4c543a41f25372adbd4c650e5aab1d722c46461a/Firmware/printer.cfg#L492C1-L492C46.

I am surprised no one else is having this issue its almost a year.