Upon updating a world containing items with command block data loaded from 21w03a to 21w05a, the world works as normal until an attempt to save is made. At which point, the game will not successfully save. On terminating the program and attempting loading of the same world, the world will generate blocks and chunks up to a certain point around where the player is standing, upon which it stops generating them. The player can interact with their inventory, but cannot input any chat commands or interact with any blocks.
I have recreated this twice, using a command block to generate an item with some lore text, and then saving and reloading. No new (in this snapshot) blocks were placed or loaded.
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I have a similar issue. When I enter the world, everything works fine for a minute or two. After that, I am able to move but breaking blocks won't drop anything and I cannot interact with beds, chests, or working table. When I saved and exit the game, the screen is stuck on saving world. I have to use task manager to close the game.
I have been able to reproduce the issue multiple times, and using alt+F3, the TPS graph is frozen. I have some screenshots and logs that might help.
[media]
Please add more information to MC-213788.
Can also reliably trigger it by simply attempting to interact with any container.