So I’ve noticed recently when I use my rear wiper it stops at random points when in use rather than going to its “home” position is there anyway to fix this or just buy another one?

You would need to test rwlay for yoir wiper motor to see if power is available as,it should, but most probably this is internal error of the motor itself, and the best is to either replace it or repair it.

I would want to rule out the relay before changing the motor. Try cleaning the relay contacts.