stream.ReceiveNext () not working when increase latency

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Hi,

I have 4 players working normally with my 30-50 normal latency. But when I increase latency of them all with:

PhotonNetwork.NetworkingClient.LoadBalancingPeer.IsSimulationEnabled = true;
PhotonNetwork.NetworkingClient.LoadBalancingPeer.NetworkSimulationSettings.IncomingLag = 50;
PhotonNetwork.NetworkingClient.LoadBalancingPeer.NetworkSimulationSettings.OutgoingLag = 50;

I start receiving this error msg: "InvalidCastException: Specified cast is not valid.". It's in my OnPhotonSerializeView, a normal cast that I have stream.ReceiveNext (), that usually works. It even works with 2 players, but not working with 4.

Anyone know what this could be?