Thanks for the reply.
Can you login through your browser's incognito/in-private window?
No, tried with Safari/iPhone, Safari/Mac and Chrome/Mac.
I see that your website is also still using basic http rather than https. it could be possible that your browser settings may be attempting to store login information as https if your forum serves relative urls rather than full urls.
Is there any kind of test or workaround for this?
Another bit of info is that my devices are not recognizing the saved passwords for the board.