Articulate Review: "Your computer seems to be offline."

I'm running the latest version of Edge, Chrome, and Firefox on Win11 on a home network. My internet connection is very strong, but I consistently have Review360 telling me I'm offline on all three browsers. It has been an ongoing nuisance over the years, and the severity of the issue seems to ebb and flow for me, but it's never prevented me from doing my work. It just leads to refreshing the page every so often, which means I'm kicked back to the top of the page and have to scroll down.
However, I'm working on a big client project this week, and Review insists that I'm offline, preventing me from leaving comments or replying to existing comments. Refreshing the page, restarting the browser, and even restarting the computer won't fix it. This version was published by someone else on the team; we have done it this way successfully on many occasions without getting this connectivity issue, but it is giving me a lot of trouble this time. We're not doing anything differently this time than we've done before.

UPDATE, an hour or two later:

And just like that, for the first time in about a week, Review suddenly shows me as being connected to the internet, and thus able to comment. Although my issue is temporarily resolved (yay!), I'm not sure the problem is gone; this is something that has been recurring (at varying degrees) for quite some time.

UPDATE, an hour or two later again:

It says I'm offline again, and can no longer comment.