"Missing reference" warnings with Julia in VS Code?

I can replicate the issues you’re seeing using the language server in emacs via eglot-jl. Notably, I made sure to wait until the symbol server had loaded all packages installed to my global environment and am still seeing the lint error. I believe this used to work, and I’m not immediately seeing any relevant issues in the issue tracker(s), so I’d definitely open an issue for this against LanguageServer.jl.