https://www.dotnetzone.gr:443/cs/blogs/birbilis/archive/2021/02/10/fix-javascript-location-hash-throttling-issue-with-iframe.aspxI had implemented a simple (and most importantly working in older browsers too) way of communication between an IFrame and its parent page via location.replace(“#” + hash), which doesn’t add entries to history like location.hash=… does, and the onhashchangeelCommunityServer 2.1 SP3 (Build: 20423.1)