1995 Isuzu Rodeo Clutch Replacement

I had this clutch replaced at 75K miles and then again at 175K miles. This third clutch doesn’t work once the engine gets hot. You have to bleed the bleeder valve on the slave valve and the diverter valve to get it to go back to normal until it gets hot again. My mechanic, Mr. Transmission, the dealer and my old mechanic cannot figure out what is causing this. Your thoughts?

What parts were replaced, other than the clutch disc itself?