It should ideally take from a few seconds to a few minutes. That's not extremely excellent, it's just good practice.
More than that and it hints towards heavy reliance on manual testing, and that's something I'd be worried about.
EDIT: Despite the parent comment's misguided logic, it seems his/her fears are actually in the right place.
An issue was opened about 6 weeks ago asking where the tests are and it received zero responses from the maintainers: https://github.com/bitwarden/core/issues/399
Also "a few days" was just a guess. I noticed that it was a problem, then I noticed a few days later that the fix had been release. I don't actually know exactly how long it took to release the fix after it was committed.
https://github.com/bitwarden/web/issues/303
Edit: Never mind, I can't find anything opened and fixed in ~17m.
> ...at one point during our evaluation we submitted a bug report about Bitwarden through its Github project; one of the product’s maintainers committed a bug fix seventeen minutes later, and just a few days after that the fix was released to the public.