I’m pretty convinced the issue is not with the Brax3’s ability to authenticate over WPA on any particular router; but is a fair bit more “gremlin” like than we may understand.
Here is someone who had it work on their previously non-working router:
Here is my theory that the issue would return and my description of what I think may be going on:
And here is the poster’s response that the issue did, indeed, return as I had suspected..sadly: