While stopped in our 2011 Proton Gen 2 at traffic lights we heard a slight noise, and then we went to go we couldn't get gears. We left car parked for a couple of hours, after which gears where fine for a bit but we lost the gears again. There was plenty of fluid when we checked, we bled the clutch and there was plenty of flow and no blockage. What else can we do?
It would seem likely to be an air leak in the system, which you should look for. Perhaps a damaged hose, loose fitting, or something like that.