@Lu_Zhang
I just had a print stop early on printing where the printer advised the filament had run out (external reel). It had NOT.
I also noticed that the blue extruder indicator was not illuminated. I ensured that the filament was pushed thru to the extruder and that the blue light illuminated. Then I extruded some filament.
Then I resumed printing from the screen.
Two things happened thereafter:-
1 The message that appeared on the device page of the CP 6 advising the filament had run out, even though it was printing again continued to be displayed until I closed the CP6. When I reloaded CP6 it had gone.
2, The printer was printing initially from the slice at 230 degrees but after the refill it stated the temperature at nozzle was 220 degrees. Bed temperature was as expected.
Lastly if the extruder motor stops (evidenced by no filament crushing / jamming / no extrusion) why does the print continue. Is it about time this was rectified. ???