When we create new hosts it seems the name_upper column on the hosts table is being left empty, causing the host to not show up in the web UI. when I update this column it works fine. I have also noticed (not sure if related) that zabbix will continue to report newly added hosts dont exist (In agent / proxy logs) until you restart zabbix-server service. even when we monitor via proxy. after restarting the service it collects data fine. Zabbix-Server 7.0.22 and PostgreSQL 17 Current workaround is a script monitoring for empty name_upper entries, updating the column with UPPER(name), and restarting the zabbix-server service.