Ok,I started to print a model. It started to print, it got a little ways done and then suddenly dislodged from the bed and the nozzle kept moving around creating a tangled mess. What did i do wrong? why did it dislodge? Stopped and tried again, but this time it didn't adhere at all and the filament just moved around on its own. stopped print. I have the Ender3 Pro with the magnetic cover piece that goes on the pad.