Currently Zabbix GUI remembers what you lastly used as groups/hosts filter. In our case ( over 1500 servers ), having All/All in Monitoring -> Triggers is great to see all issues of the whole serverpark. But when switching to for example Monitoring -> Overview, we do not want to load the whole serverpark in there. It takes minutes to load and is very slow. Having seperate "defaults" or making it per-page would be a great solution!