This is the second post I have seen today where pages aren't loading fully.
I don't think it's a longstanding issue.
Perhaps it has something to do with them trying to distribute the server load geographically (to reduce lag).
I would encourage you to try to file a bug report.
The performance on windows is just terrible. In the evenings its unplayable and the page doesnt load propperly. Anonye else experiencing those issues? Tried 3 different browsers and all recommendet settings, nothing works. Chess.com does work fine on the android app, but windows is more and more unplayable. Guess i have to cancel my subscription, as it doesnt seem to improve.
:/