Do you not run into too many false positives around "ah, this thing you used here is known to be tricky, the issue is..."
I've seen that when prompting it to look for concurrency issues vs saying something more like "please inspect this rigorously to look for potential issues..."
What's more useful is to have it attempt to not only find such bugs but prove them with a regression test. In Rust, for concurrency tests write e.g. Shuttle or Loom tests, etc.