Players unable to join after a while

[Netherwhal]

Expected behavior

Players are able to join

Observed/Actual behavior

After running Folia on 8939611bb53d6d1d98fd76e91c320d55a28700ad for a couple of hours (varies), players are unable to join. Either stuck in "Encrypting" or "Joining world" screen until connection times-out.

No Exceptions / No Errors. But logs are full of:

[12:38:44] [Region Scheduler Thread #4/INFO]: Foobar (/xxx:20758) lost connection: Disconnected
[12:38:51] [User Authenticator #90/INFO]: UUID of player Foobar is 1efb7ece-
[12:38:54] [Region Scheduler Thread #3/INFO]: Foobar (/xxx:20823) lost connection: Disconnected

Switching to 7bc26ecc74fed21699033d5e7ed5d003796b60cf resolves the issue for now, but I need more days to confirm.

Steps/models to reproduce

Unfortunately I do not have a way to reproduce. On Test-servers everything works fine. Only with "real" load the issue occurs. It seems like having less plugins installed increases the time until the issue occurs, but even with zero plugins, the issue still happens.

Plugin and Datapack List

This is an issue with no plugins installed

Folia version

8939611bb53d6d1d98fd76e91c320d55a28700ad

Other

Tried Java 17 and 21 with various args, removing jmx, adding Velocity in-front - nothing helped except rolling back.

[Spottedleaf]

e22501a