Elcarajillo Sometimes it happens during maintenance for a day or so.
However there is one thing where the software itself is lacking in good function. If you are in a long thread, with 300+ posts and you refresh, that thread can take a long long time to load up, I think because it has to load everything before the last 5 or 6 posts are shown.
It’s always better to re-eneter a long thread from the main landing page, rather than refresh it.