Try switching off View > Signposts > Hide Signposts if it’s activated, in case there is a tell-tale signpost visible that could indicate something hidden there.
If you can’t figure it out, you might find that the act of cutting down the project to a minimal case to attach here for further investigation is instructive, and that once you remove certain things, you’ll figure out where the issue is coming from.
Some advice on how to cut down your project and attach it here in order to ask for help most effectively: