IP seems to have some issues with Ars Nouveau new planarium block

[Keltas]

If it's a mod compatibility issue, please provide the link(s) to the incompatible mod(s)

https://github.com/baileyholl/Ars-Nouveau

Minecraft version

1.21.1

Describe the issue

Ars Nouveau has recently added a new pocket dimension block in the form of planarium.
It has actually two seemingly separate issues.
The first occurs when creating the dimension for the first time and is not limited to just Ars Nouveau. Here is the log: https://mclo.gs/CEadrF8
When entering the planarium for the first time the game crashes because of missing dimension exception. This issue also occurs to me with other dimension generating mod - Pocket Repose, although that one is a Fabric mod run using Sinytra Connector so initially I thought that was the cause.
Anyways, this bug occurs only during the first generation of a dimension and after rejoining the world it works perfectly fine in Pocket Repose, except in Ars Nouveau planarium's case we get the second issue.
After entering and leaving the planarium (by breaking the walls from the inside), I get kicked out to the server list because of some issue with packet handling (Here is the log: https://mclo.gs/j9M7sxW)
This seems to occur pretty much every time I enter and leave the dimension.