My driver side rear caliper got stuck, all other corners were fine so I replaced it with a rebuilt one from autozone, didn't have any problems for a little while and now it's showing the exact same symptoms. I'm reluctant to just try and replace it again, seems like I'd be wasting my time. None of the lines are clogged, I bled the whole system in the process and it worked fine. Can a problem with the master cylinder end up with one corner messing up?