TileEntity

Did you allocate more RAM?

Make a test without lithium

Add the crash-report or latest.log (logs-folder) with sites like https://paste.ee/ and paste the link to it here

Make a test without Create

If you are using AMD/ATI, get the latest drivers from their website - do not update via system

Delete the flywheel-client.toml file in your config folder and test it again

Make a test with the latest create build and the 2 addons - then add the new crash-report

https://www.curseforge.com/minecraft/mc-mods/create/files/all?page=1&pageSize=20&version=1.20.1&gameVersionTypeId=1

Remove the mod Registrate

Add epherolib https://www.curseforge.com/minecraft/mc-mods/epherolib and try an older builds of Create

Maybe some kind of memory leak Make a test without these mods: starlight flans cupboard modernfix supplementaries betterendisland

Make a test without modernfix and chunkpregen

Create a new world with the same settings (gamemode, gamerules etc) and copy the level.dat, level.dat_old and session.lock from the new world to the broken one - delete the new world and test the broken world again

The level.dat is broken Backup and delete this file and rename level.dat_old to level.dat and test it again

Maybe an issue with resourcefullib-forge

Make a test without the mod exposure

Remove ArcaneAbilities or add relics

Is there a change if you set max-tick-time to -1 in the server.properties?

Also remove brigadier

Backup the world and make a test without storagenetwork

If there is no flywheel mod, then it is part of create - add the new crash-report without create

Maybe an issue with Create/Flywheel

Add the crash-report or latest.log (logs-folder) with sites like https://paste.ee/ and paste the link to it here

Also remove Ryoamiclights

Also remove xenon