The bug

When a player teleports to the dimension that contains the entity with the same UUID as the player, repeated fatal errors occur.

How to reproduce

1. /execute in minecraft:overworld run teleport 0 0 0

2. /execute in minecraft:the_nether run forceload add 0 0

3. /execute in minecraft:the_nether run summon minecraft:item_frame 0 0 0 {UUID: α, Fixed: true}

   (Replace α with the player's UUID)

4. /execute in minecraft:the_nether run teleport 0 0 0

   → An unexpected error occurred trying to execute that command(class bed cannot be cast to class aaw (bed and aaw are in unnamed module of loader 'app'))