What happened?

First of all, Gardens of the Dead is a Forge mod, I'm using Sinytra Connector to play Better End in a Forge instance and Better End's library BCLib seems to break Gardens of the Dead biomes as you can see in the screenshots, Better End does not need to be installed, the issue also occurs when only BCLib is present. I'll provide the debug.log, the modlist and screenshots of the issue. This bug should be easy to recreate. I submitted this issue on the Gardens of the Dead github as well since I'm not sure who this issue is relevant for.

I understand it's weird to submit an issue for 2 mods from different modloaders but nowadays many mod creators consider Sinytra as a legit "port" of the mod for Forge.

Without BCLib:

With BCLib:

Debug.log:
debug.log

Modlist:
forge 47.4.9
gardens-of-the-dead-forge-4.0.1
better-end-4.0.11 (issue occurs without Better End)
bclib-3.0.14
Connector-1.0.0-beta.46+1.20.1
ConnectorExtras-1.11.2+1.20.1
fabric-api-0.92.2+1.11.12+1.20.1
architectury-9.2.14-forge

BCLib

3.0.14

WorldWeaver

none

Fabric API

0.92.2+1.11.12+1.20.1

Fabric Loader

forge 47.4.9 (Sinytra Connector)

Minecraft

1.20.1

Relevant log output

Other Mods

gardens-of-the-dead-forge-4.0.1
better-end-4.0.11
bclib-3.0.14
Connector-1.0.0-beta.46+1.20.1
ConnectorExtras-1.11.2+1.20.1
fabric-api-0.92.2+1.11.12+1.20.1
architectury-9.2.14-forge