Lints stop firing if macro reports with `Span::call_site`?

I was trying to apply this diff:

Code

         let variants = self.variants.iter().map(|variant| variant.ident.clone());
-        let sql_graph_entity_fn_name =
-            syn::Ident::new(&format!("__pgrx_internals_enum_{}", name), Span::call_site());
+        let sql_graph_entity_fn_name = quote::format_ident!("__pgrx_internals_enum_{}", name);

Current output

warning: function `__pgrx_internals_enum_SomeValue` should have a snake case name
  --> pgrx-examples/custom_types/src/generic_enum.rs:15:10
   |
15 | pub enum SomeValue {
   |          ^^^^^^^^^ help: convert the identifier to snake case: `__pgrx_internals_enum_some_value`
   |
   = note: `#[warn(non_snake_case)]` on by default

   Compiling schemas v0.0.0 (/home/jubilee/tcdi/pgrx/pgrx-examples/schemas)

Desired output

None?

Rationale and extra context

This takes in an enum's name, so of course it formats out to using __pgrx_internals_enum_SomeEnum or whatever. But format_ident is basically just constructing an Ident but with the Span of the original ident it is based on. Apparently the expanded code triggers lints only if it has that span, but Span::call_site does not! It seems odd/annoying for the lint to ignore irrational spans like this but punish me for trying to forward the correct span so that errors get reported more clearly from the macro.

This is slightly different from https://github.com/rust-lang/rust/issues/24580 because it's about the lint firing being inconsistent but I don't mind if it's closed for technically duplication I guess.

Other cases

No response

Rust Version

rustc 1.79.0-nightly (ccfcd950b 2024-04-15)
binary: rustc
commit-hash: ccfcd950b333fed046275dd8d54fe736ca498aa7
commit-date: 2024-04-15
host: x86_64-unknown-linux-gnu
release: 1.79.0-nightly
LLVM version: 18.1.3

Anything else?

No response

Reproduce the lint difference using the example at pgrx-examples/custom_types/src/generic_enum.rs and the reported Rust 1.79.0-nightly version. Compare identifiers created with Span::call_site and quote::format_ident!, then trace how their spans affect the non_snake_case lint; done means the behavior is explained and covered by a regression test.