348 clutch not hold pressure when engaged .

Recently the clutch on my 348ts has started to slowly engage while pushed in. Like if I’m at a stop light in gear with the clutch pushed in after a few seconds the clutch starts to engage while the pedal is still down. If I’m driving the pedal pressure feels regular and it shifts just fine. It’s when I’m sitting with the clutch in.
No leaks in the rear of the car. However it seems to be pushing out fluid from the overflow tube on the reservoir . I’ve checked the master cylinder for leaks and the lines up front. No fluid anywhere. I’ve bled the clutch several times and no air in the lines. Any ideas?
This is a newer clutch, and throw out bearing.