Looks like my trouble roughly described in dereferer.pw thread, so this makes me third user to post about this - for that minute or two, when page is still loading, Javascript is not functional, meaning that all actions like display of message form are either done as a raw HTML (opening a new page so that I can like post, for example), or just nothing happens (writing a reply can open a page, that by itself is still loading, so it seems empty in the meantime).