I think I have not encounter this myself. But perhaps this is due to some spammers overloading it temporarily as we always have some get through.
But browser caches are source of confusing these days. They are so overly persistent now. Which is good and bad at the same time…
The forum provides some stripped down mobile version automatically (since, well, your site itself is not yet responsive due to time issue working on that…). But glad it is not really bug since we cannot really do anything here since we are dependent on the forum vendor here…