Has your issue been resolved? If not, I’m curious, do you have any other audio software installed? Or, recently removed? If so, at minimum, there may be some remnants being left behind from old audio software that are influencing this behavior. If you’ve never had anything installed/uninstalled recently, then for now I’m out of ideas.
Have you happened to look at any of the logs when this behavior occurs? If not, that’s okay. If you know how to pull those up, though, there may be some clues in their contents.