Entering Beneath on AT launcher Softlocks The World

[oliwier509]

Description of the Bug

more info at: https://discord.com/channels/881234100504109166/1318857238022062140
seems like ATLauncher has a problem with susy in general.

Reproduction

enter the beneath while using the ATLauncher

Version

0.1.13.15

Relevant log output

missing as of now, check again later

[Pasrules]

I had this issue a month ago but it no longer occurs in the current build.

Originally to replicate:

1. ATLauncher, generate single player world
2. Try entering the beneath, screen goes pink, inventory works
3. Alt + F4, to exit

Does not occur in SMP.