Happy to comment - not a problem on our side as we are the gatewway to people watching hundreds of thousands of hours worth of content on a weekly basis without any problem.
These issues whilst frustrating for individuals concerned, are isolated, indeed, this is the only person who can't seem to get anything going as far as I'm aware, so keen to try and understand why and help out. Sent a PM and posted on the forum, but haven't heard back yet.
Feel free to point me to other cases and I'll happily assist.
If you type "internet content" into the search box on the first page of the Bravia forum, you'll see quite a few posts where owners have had problems either with internet content disapearing altogether, or else having problems refreshing internet content. In my case I lost all internet content a few weeks ago for no apparent reason, and even with a stable internet connection that passed all of the Bravis troubleshooting tests, I couldn't refresh content. In the end I had to resort to a factory reset, losing all of my settings. To me, there seems to be a bug in the internet content platform that's causing these issues. But I stand to be corrected