hi, i have the k2 plus combo with Cfs my 3rd slot keeps retracting completely, so the filament isn't in the tube at all even when I'm not using slot 3. no blockages or anything like that then the whole cfs becomes none responsive to the point I've removed it completely and using the single spool on the side I'm been asked to video it happening, but it always happens randomly, so I don't catch it no error codes it simply stops working PLEASE HELP