@noffle fixed now. It was because of the nginx reverse proxy caching, which was not including the query string when testing if a request is for a cached resource. git-ssb-web uses a query string parameter rev for the branch navigation by menu feature. So I added $arg_rev to proxy_cache_key in the nginx conf location block for git-ssb-web. I also added a bunch of other $arg_… values for query string parameters that git-ssb-web uses to the nginx conf, which should improve functionality of other pages on git.scuttlebot.io (including searches).