Take note of this post by @cagonzalez, a Bitwarden employee. In it he states “we did re-architect elements of the inline menu that have exacerbated the problem”. Although he was discussing Passkeys on Safari, it would not surprise me that the re-architecting affects other clients too.
The important take-away for me is that the developers are aware of auto-fill issues and have fixes forthcoming. So, either revert to an older version for a while or live with the limitation knowing that a fix is on the way. And, if you believe you have encountered a unique case, file a bug report about it.