Using a dedicated server from Indifferent Broccoli set to 10 players. We've had several instances of all players getting kicked from the server when a player joins (different players, not just the same one), always well below the 10 player limit. Server status is "online" with no disruptions.
After this happens, a couple of players are unable to rejoin the server at all until restarting their computers and resetting their wifi entirely.