Minecraft's world creation uses light_dirt_background.png, MidnightLib's config uses options_background.png. Both of them use the same tabs
This partially breaks resourcepack compatibility

Possible solutions:

• Use light_dirt_background.png
• Add a new texture

The options background texture is used, because these screens contain an options list widget, which uses that as it's background. Changing the texture would require adding our own renderBackground method, which would increase the file size a lot.

Is adding a new tabs and footers texture a better solution then?

Is adding a new tabs and footers texture a better solution then?

Nope, that'd require even more code.

So there's no fix I guess :(