The Atlas texture does not show correctly after pressing the M key.

Other mods Installed:

• Supplementaries {1.21.1]
• Moonlight Lib [1.21.1]

I don't have Accurate maps or Immersive portals. Thanks!

Same issue on NeoForge 1.21.1.
Seems like it's incompatible with InvMove mod. The Issue is gone after I remove that mod.

Did you report there?

Sorry I was too tired to do more test for useful informations. So I didn't.
But now I figured out what's going on.
In the config page of InvMove mod, we can set which UI Background are going be hiding.
We can set that to show all UI Backgrounds, or under the "+key.invmove.unrecognized.nomod" options, find the "AtlasOverviewScreen" and set to Show Background.
Then things are fine now!

Wait so those are the only mods on?

Ah yeah you're right! I've got other mods on but I have a feeling this might be a resource pack conflict. I will do testing and find out.

figure this one out? im having the same issue and i also think its a resource pack issue.