[Problem solved] So i have [-11]SendBufferFull callback from photon when joining the room. It happens when i enter the game, add some RPC calls to the buffer, close the game and re-open it. Any ideas of how to fix that? How to change the Buffer size? Sending less data will not solve it for me, since i need to sync all items on the scene that dropped by each player, there a lot of items actually and each player send Buffered RPC on drop.