Can you give us a screenshot of the XMR tab not populating? Thats also not happening on any of my machines, and not reported anywhere.
Is it that you just have to paste the address in and click lookup?
Sure, no problem. Here is a screenshot. It happens on all web browsers but was working fine just a couple days ago.

I see that, ok. Well thats sort of a smoking gun right there as I havent seen that behavior.
Please try opening a google chrome incognito window and pulling it up, and see if you can switch to the XMR inquiry tab.
One know issue with nomp is if you leave a browser window open, the page subscribes to the single thread (which I dont like) and it takes 60 seconds to update if you hit f5.
But a new incognito window refreshes all the tabs usually pretty fast (but not very fast).
On a side note, I plan on having the second pool ready by Monday evening, so if all else fails you can test it.
It sure does seem like your computer starts a session, then hangs up before it can solve a bbp share.
Id still recommend running a cat5 cable directly from a machine and try to mine from it through the router (eliminate wifi).
That imho, is the best shot right now to circumvent other tests first.