Errors in code doesn't show unless file is written.

Hello, I was trying to set up rust-analyzer for neovim and found out that the error messages would only appear if I write the file. E.g. when I put in some gibberish nothing would show on the side of the code telling me that this should not be here, only after I do :w would I get an error message shown. This was not the case for me when I setup C using ccls and Python with pyright. I'm using lsp-config to configure my lang servers, and have tried both rust-tools and rust-analyzer by itself, still the same behavior.

Start by reproducing the report in Neovim with rust-analyzer, comparing unsaved edits with the behavior after :w. The payload names no source files or tests; done means diagnostics appear for invalid unsaved Rust code without requiring a write, with the relevant configuration and environment recorded.