Modem says Not Connected but is!

I’m on T-Mobile home internet. It works fantastically. However, it recently began displaying the message not connected to the internet but it is. In addition, I called T-Mobile on a non-related issue and they asked if I was having a problem with my internet. Any thoughts?

If you can, share with us the Modem Status page and signal page. Also, what IP is being given to your directly connected device? (router/PC.etc)