Reload page if a browser-cached version is loaded! ie; via back or forward buttons... https://stackoverflow.com/a/43043658/6419332

reload_on_cache_laod.html

    <script>
        /** Credits: https://stackoverflow.com/a/43043658/6419332 */
        window.addEventListener( "pageshow", function ( event ) {
            var historyTraversal = event.persisted ||( typeof window.performance != "undefined" &&
                    window.performance.navigation.type === 2 );
            if ( historyTraversal ) {window.location.reload();}
        });    
    </script>