Running Forge for 1.21.1 keeps waiting for player to load

[rubensworks]

While the action seems to work for NeoForge (minus the game tests: #119), it seems to fail for Forge.

It seems to be stuck on the following:

[13:07:44] [Render thread/INFO] [minecraft/Minecraft]: Waiting for player to load...

Workflow (temporarily disabled running the action on Forge): https://github.com/CyclopsMC/packtests/blob/master/.github/workflows/gametests.yml
Logs: https://github.com/CyclopsMC/packtests/actions/runs/20878671608/job/59991732022

[okafke]

Does your modpack add custom dimensions? I think this could be related to #115

[rubensworks]

No, there are no custom dimensions.
I don't know the precise conditions under which the "Experimental Settings" screen is shown, but has always been like this for most of my mods on Forge since a long time.

Is there any way I could work around this? Or is this an issue that needs fixing?