Josephine It goes back to the previous page you were on when you refresh the page? How are you refreshing the page?
I think Flarum tries to refresh content dynamically and there are ways of making that work better that are more expensive in terms of server resources. I suspect FreeFlarum has made some optimizations to lessen the load that may be causing some of these bugs.
It's just speculation on my part though. There are some other avenues to investigate.
