Steps to reproduce:

1. Backup Zabbix Server and Zabbix Database;
2. Upgrade Zabbix Server;
3. Backup Zabbix Proxy and database;
4. Upgrade Zabbix proxy;
5. Test all components of Zabbix Server;
6. After a few days we created a new host for monitoring, but new items for new hosts do not have the values collected by zabbix proxies or zabbix server.

New items are collected normally through Zabbix's test functionality, but they are not collected automatically through the configuration of collection times.

Discovery rules are working normally and creating new items, but the new items also do not have their values collected or at least they are not being written to the database.

Old items have their values collected normally and are not having problems.

Result:

Other itens (Old only) was normaly collected.