MMU2 can still make unsafe selector movements

[vintagepc]

Encountered this today with F2 loaded to nozzle (Filament read "?" due to power cycle since it was loaded). Mk3S FW 3.9.0-RC w/ 1.0.6.

Went to first-layer calibrate a new sheet, accidentally selected F1. Printer printed intro line and screen then changed to "?>F1". Extruder unloaded, and the MMU moved the selector to slot 1 despite the fact there was still filament in the FINDA (light was out, FINDA has been adjusted and has never given me a false runout during prints)

Of course it jammed and I had to partially unmount the selector motor to unbind things.

[szafran81]

Confirmed. I'm having this all the time - specially when the MMU errors out during loads/unloads that way that the 5/10 leds blink and you have to reset the MMU to continue. After that in 95% of cases the print goes to trash because every time after unload from extruder the MMU instead of unloading the filament moves the selector with the filament loaded (and yes FINDA says the filament is in the tube all that time). And this continues even after moving the selector to the right place and unloading the filament by hand, and then reseting MMU again so it can home.