My world, created around 1.20 began experience a gamebreaking issue immediately following update to version 1.20.5. The issue began with slow world loading times in the game menu. Upon joining I found that there was massive 3-6 minute long spike of lag whenever the game autosaved or a command was run from any source. When playing multiplayer, these lag spikes would disconnect anyone who was not the server host within 30 seconds.
This occurs on all worlds I create in any game version past 1.20.5 and all game versions and snapshots proceeding.
It additionally appears to greatly increases the load and save time for Minecraft worlds even when just accessing the esc menu
It's rendered the game unplayable and I cannot for the life of me figure out what changed in that patch to cause it.