This is happening to me too, mine seems to be very weird, at first I open the cap and see that the tank is empty and then I top it off.
I then try bleeding procedure and this foams starting to show up, not bubbles but literally white foams. After I park the car for half an hour, the white foams disappear, but it shows up again if I try bleeding the system.
So this can conclude that my main reservoir take is leaking? or Intercooler?
