I got my mini in early May, and it's been working fine until recently. I wanted to change the filament, so I unloaded my current one and went to load in the new one (switching from prusment ABS to a generic PLA). I cut the new roll so the end had a point the extruder could grab on to. However, after the nozzle was up to temperature and everything was ready, the extruder jammed. I tried it again without any filament touching it and it ran fine. The gears are lined up properly and the motor is fine. Does anyone know what could be causing the extruder to jam up like this?