I have a new Ubuntu server with the most recent IspConfig installation. I'm using nginx and each website is in a chroot. Each website is served on both ipv4 and ipv6 and all websites are assigned to a shared specific IP. I have an issue where sporadically a different website is served on the wrong domain. This seems to happen on http and https, and I even had a website which was disabled being served up (I hope that was from a cache somewhere). So I navigate to https:// somewhere . tld and it looks OK, I click around a few times or hit F5 and on the same URL I now get a website from a different customer. The website glitch happens across websites and even customers and just rapidly F5-ing seems to trigger it within a few minutes. I have updated all packages on the OS to the latest version and updated IspConfig today to ensure its not due to old packages. Can it be related to how each website runs in a chroot?