Bug: <title>Odd custom Aether main menu dysfunction

[JohnGoten]

What Feature Types Apply to This Bug?

Gui, Other (Please Describe)

Other Type

Cumulus Aether Main Menu

What Type of Bug Is This?

Compatibility

Mod Loader

NeoForge

Mod Loader Version

21.1.77

The Aether Version

1.5.1-beta.2

Is This Bug a Conflict With Another Mod?

Curios Compat Layer for Accessories 9.0.12+1.21.1 | FancyMenu 3.2.2 + Konkrete 1.9.9 + Melody 1.0.10 | Seamless Loading Screen 2.2.1+1.21

Client Log

https://gist.github.com/JohnGoten/07f2b928d4a2a146fd99fedd2b2bb8ee

Crash Report (if applicable)

No response

Steps to Reproduce

Install the mod list as shown in the client log (latest.log directly from Prism)
Enable either of the mods which cause a conflict between it and The Aether I
Switch to the Aether themed main menu using the button up top

What You Expect To Happen

A visual change from the 1.21.1 default main menu to that of the Aether I's alongside its moved button layout

What Actually Happened

The main menu remains the same visually and functionally as that of the vanilla 1.21.1 game

Additional Details

Here's the "odd" part of my investigation as just a casual end user:
In an isolated instance with NeoForge 21.1.77 as well as The Aether I, Curios Compat Layer, FancyMenu and Seamless Loading Screen the bug in question does not appear to occur at all.
I am fully aware that with more time on my hands I could possibly manage to figure out more culprits to this matter, it was requested of me to report this on the tracker for now. Not to mention that I do lack the truly technical understanding of what is exactly happening here.

Please Read and Confirm The Following

• I have confirmed this bug can be replicated without the use of Optifine.
• I have confirmed this bug is on the most recently supported version of Minecraft.
• I have confirmed the details provided in this report are concise as possible and does not contain vague information (ie. Versions are properly recorded, answers to questions are clear).
• I have confirmed this bug is unique and has not been reported already.
• If playing on a modpack, I have reported this bug to their issue tracker already.
• I have confirmed that I'm reporting a bug in The Aether I, not The Aether II.