Version Information

Minecraft Version: 1.20.1
Fabric Loader Version: 0.16.0
Fabric API Version: 0.92.2
Nostalgic Tweaks Version: 2.0.0-beta.903

Description

When logging into a server that offers or forces a resource pack download, the download progress screen does not appear (EDIT: if the Old Progress Screen option is enabled), resulting in a soft-lock state of being unable to control anything, even after the download finishes in the background and causes a resource pack reload screen to appear. Secondary startups that already have the server's resource pack cached in .minecraft/server-resource-packs do not produce this issue.

Reproducible with nothing but:

Screenshots

NT is on - download progress screen never appears, and after the download finishes in the background and resourcepacks reload, I still can't do anything, with the cursor visible as if I'm in some GUI:

NT is off - download progress screen appears, finishes, then afterwards I'm finally able to move around:

This option was to blame, turning it off resolves the issue too.