So I just installed a new Exedy OEM clutch and a OEM Subaru fly wheel (throwout, pilot, rear main seal too) for my 2004 WRX wagon. For the first 100 miles of breaking it in, it started to occasionally make a weird popping sound and then the clutch would be slow to disengage and/or sometimes not even engage again. This only happens like 1/10 shift and the rest of the time the car shifts perfectly. I don't think it has anything to do with inside the transmission but maybe outside. I bleed the slave cylinder and remounted it. IDK what else to do?