Fast blow won't hurt. In actual fact will protect machine quicker by blowing fuse quicker.

I say disconnect both magnets and play some games then reconnect one magnet at a time and see what happens.
Do this to both magnets by reconnecting one at a time.

Magnets overheating are a big problem.
What's the cost to replace the magnets if they are not working correctly.
Can u identify the driver which runs them and check the voltage there isn't too low or too high ?
The Next step is Beaky.