Hi, i have some bugs with my filament sensor.
Using 1.4.9 - Repeetier Server on 2x Ender 3 S1 and 1x Biqu B1 Se Plus (Both with filament sensor).
When the filament runout, the Ender 3 printers, don't run M600 or M412 S1, some times i send the comand M412 and don't have response or not recognized.
But the Biqu, i don't have this problem...
Using marlin at both printers and Repetier monitor last driver on Windows.