PhotonNetwork.CloseConnection alternatives

I am trying to implement a routine to check for a stalled MasterClient and assign a new one, if the current is not responding. But other thing I must do is kick/disconnect the stalled MasterClient from the room. I tried PhotonNetwork.CloseConnection, but as far as I understand that actually send an event to the Player to disconnect by himself, but in the case of a stalled client (this could happen on mobile a lot, the player has pressed the Home button) this is not a solution, because the client will never disconnect. I could try to destroy all his objects and etc, but as far as I understand, on the server he will still keep one slot inside the room, so if the room is max 4 players, we will have 1 slot less.

Any idea how to say to the server, this player is stalled, disconnect it or is this actually possible in the current Photon setup?