Failure to feed/retract

That looks quite low. Not a usual problem as I’d have expected a higher than nominal diameter, but I did have issues with too thin filament in the past. In my case, a clog had caused the extruder to grind away filament, reducing its width. After cleaning the extruder, it could no longer get a grip on the too thin filament.
Not sure if it fits your failure observations though.
:crossed_fingers: