Mk3.5 MMU3 & doing a 1st layer calibration  

Mk3.5 MMU3 & doing a 1st layer calibration

I tried to do a 1st layer calibration print with my MMU3 active and found that the only way I can do it is by loading the filament to the nozzle (not just preload to the MMU) before running the calibration option. If I didn't load to nozzle then the calibration routine would just heat up the hot end and then sit there doing nothing. It also then requires a manual unload after the calibration is finished. Unlike the MK3S/+ MMU3 environment where the Printer would prompt which MMU filament you wanted to use. I feel this is a bug but would like confirmation (ie not my user error) before I put a bug issue up on github.

I am running MK3.5 5.2.1 & MMU3.0.2 firmware (latest) as well as REVO Nozzle (works well !)

(I think sort of related is that I tried to put a MK4 single mode sliced print and it also would not prompt to load a filament from the MMU and happily ran the print head around without any filament {yes the filament sensor is functional} so I have gone back to using the MK3.5 MMU mode slice option even for single colour prints. )