Locations of diagnostics getting out of sync

[deifactor]

If I open a Rust file with the following contents:

fn main() {
    let x = 1;
    println!("{}", x.baz);
}

and then add a bunch of newlines above the println!, the error diagnostic shifts from x.baz to earlier in the line:

Notably, if I set (setq flymake-no-changes-timeout 1000), then everything is fine until I flymake-start. It looks like something in the LSP <-> eglot <-> flymake chain is messing up the positions.

Saving the file causes it to snap back to the right place.

[tshu-w]

Some related discussion and issue.