Honestly, I don't think these are problems that Rust has. What I see LLMs struggle with in Rust is more to do with understanding the language semantics at a fundamental level - exactly the things that the compiler statically verifies. For example, they will see things they think are "use-after-free" or "use-after-move", neither of which is a thing in (safe) Rust, because they don't understand that the language does not have these problems.

Largely I think LLMs struggle with Rust because it is one of very few languages that actually does something new. The semantics are just way more different than the difference between, say, Go and TypeScript. I imagine they would struggle just as much with Haskell, Ocaml, Prolog, and other interesting languages.