filament tangle stopper

i recently had to remove my nozzle and extruder gears to remove a bit of stuck tpu that had snapped because a loop of filament got over the side of the spool and got trapped between my spool holder and printer. (as seen in the second last photo) i think this was because the spool holder which i printed (which is great by the way) has bearings in the roller meaning it spins very freely and for some reason some of my spools will spin as there being extruded and the momentum keeps them going for a couple of turns meaning the loose filament can then make its way over the spool wall and slowly get pulled tighter and tighter. i was going to make some sort of cover that covers half of the spool to stop any filament getting over the spool wall and getting trapped but decided that it was a lot of hassle especially when it came to changing filament.i instead opted for this sprung roller that, one puts a tiny bit of tension on the spool so it doesnt pick up momentum and keep spinning when it shou