When players enter the end portal if the gamerule is set to true players will be stuck in a loop of joining and then disconnecting, unable to escape unless the gamerule is set to false so they can properly get sent to the end and then teleported out.
When items are thrown into the portal it causes a ticking entity and crashes the server, even if the gamerule is set to false afterwards. Only fixable if you delete the entity from the world.
crash-2024-11-17_01.45.54-server.txt