PhotonTransformViewRotationControl.cs

// Updated method in PhotonTransformViewRotationControl.cs
public void OnPhotonSerializeView( Quaternion currentRotation, PhotonStream stream, PhotonMessageInfo info )
{
    if( m_Model.SynchronizeEnabled == false )
    {
        return;
    }

    if( stream.isWriting == true )
    {
        var y = currentRotation.eulerAngles.y;
        var qy = (byte)((y * 255) / 360);
        
        stream.SendNext( qy );
        m_NetworkRotation = currentRotation;
    }
    else
    {
        var qy = (byte)stream.ReceiveNext();
        var y = (qy * 360) / 255f;
        var rot = Quaternion.AngleAxis(y, Vector3.up);

        m_NetworkRotation = rot;
    }
}