Your app address is now you.runv.sh
Your own address for an app or a tunnel is now you.runv.sh. It used to be you.tun.runv.club, and those addresses keep working: they send visitors to the new one.
Nothing changes on your side. The socket is still /run/runv-apps/you/app.sock, and the same ssh -R line still works.
The reason is the browser. To a browser, everything under runv.club is one site, so a page served from a member's app could set cookies that git.runv.club, links and feeds would also get. runv.sh is a site of its own, so that can't happen any more. If your username has a _, the address has a - instead, because web addresses can't have _.
pablo