Wrong axis position display if a picomux daughter board is not correctly powered

In a picomux configuration, if a daughter board is not powered, the WebUI displays a wrong position (a copy of the previous axis).

Axis 3 is displayed as unknown in the process UserInfos.

PMC_MUX LAPP-PicoMux-PMXE9DE7F

PMC_MOTOR Axis1	1 1	2000 100000
PMC_MOTOR Axis2	1 8	2000 100000
PMC_MOTOR Axis3	2 10