When using The Aether along with Industrial Craft 2 Classic the game will crash when any sign from IC2C is placed, Aether signs are completely unaffected.

I went around and placed a bunch of blocks with the Aether & IC2C installed & the only time the game crashed was when I placed any sign from the IC2C mod, I have yet to find any other crashes though I did not use every machine & item from either mod, I did however place most IC2C blocks & Items to see if the signs were the only problem & only ran into issues when any sign from IC2C was placed.

Mods installed:
aether-1.19.2-1.0.0-beta.1.2-forge
curios-forge-1.19.2-5.1.4.1
IC2Classic-1.19.2-2.0.7.1
theoneprobe-1.19-6.2.2

Mod Links:
https://www.curseforge.com/minecraft/mc-mods/aether/files/4771515
https://www.curseforge.com/minecraft/mc-mods/ic2-classic/files/4746971
https://legacy.curseforge.com/minecraft/mc-mods/curios/files/4523009
https://legacy.curseforge.com/minecraft/mc-mods/the-one-probe/files/3965693

Exit Code:
The game crashed whilst rendering block entity
Error: java.lang.NullPointerException: Cannot invoke "net.minecraft.client.resources.model.Material.m_119194_(net.minecraft.client.renderer.MultiBufferSource, java.util.function.Function)" because "$$12" is null

Crash Log Forge 1.19.2 (3.3.0) As soon as the sign was placed:
crash-2023-10-04_12.52.49-client.txt
Crash Log Forge 1.19.2 (3.3.2) Reloading into the world that it was placed in:
crash-2023-10-04_12.56.37-client.txt
Crash Log Forge 1.19.2 (3.3.2) The Aether & IC2C only (curios & the one probe disabled) Reloading into the world it was placed in:
crash-2023-10-04_13.14.22-client.txt

The crash can be worked around by disabling The Aether & getting rid of every IC2C sign then re-enabling The Aether, or by disabling IC2C loading in & then re-enabling IC2C when the sign is gone. So, the mods can still currently be used together, but the Industrial Craft 2 Classic signs need to be avoided like the plague in order for no conflict to happen & if the crash happens one mod will have to lose its progress to resolve it.

Can confirm this, is there an eta on this?
It just borked my world for me and i extensively used both mods so i can't just remove one to get back into the world.

For anyone coming to this later, i solved the issue by looking at the blocks coordinate in the Crash-Report and using the /setblock command in the server console to remove the sign.

Aether and @bconlon1 helped me figure it out @togera13 and @LKD-PIX
Basically when we added the blocks in 1.14.4
This function didn't exist:
https://github.com/The-Aether-Team/The-Aether/blob/1.20.1-develop/src/main/java/com/aetherteam/aether/client/AetherAtlases.java#L26

This will be a pretty simple fix :)
And will be addressed next patch