So, I draw screens on top of each other with a z translation of 2000.
With your mod installed, it does this.

it should look like this.

This is my layering logic
https://github.com/TeamJM/journeymap-api/blob/56b6778a4bfebfee80ed10673988ee5809b5bfe4/common/src/main/java/journeymap/api/v2/client/ui/component/LayeredScreen.java#L47

I am curious what you are doing that is causing this? I can increase the z translation to 2001 and it fixes it. But, that only fixes it on my end with my mod. This is likely causing compatibility issues with other mods too, so we should come up with a solution that fix it at the source.