Failing to Connect to Popular rooms?

Recently the more users in a room the harder it is for other players to enter. I debug everything and it appears that trying to load into these rooms continuously disconnects from the server ( I have it set up that users will reconnect automatically if disconnected, so it's an endless loop of disconnecting and reconnecting in an attempt to join the room from the lobby.

I've set my max players for any room to 0 and then I set it to 100 just to be totally sure it's not the max player number, Generally once a room has more than 5 people in it other players trying to connect have a lower chance of getting in if at all. Some players DO make it through after multiple tries, but it seems nearly impossible from the debugging side of things.

I also recently get the QueueIncomingReliable error now for trying to get into a room once I changed the max players setting. Is there a way I can possibly set some kind of period in between players recieving player information when they log in (Everyone calls all their important information on start so it all comes in at once and doesn't send again) Or possibly temporarily set serialization to be unreliable until a player joins and then reliable after they're in?

I'm unsure what to do, especially since I have 100 CCU but we're not going over 40 players in game at any moment.