Summary: Pagination in the Zabbix frontend loses host-specific filters when navigating beyond page 1 in the Items and Triggers views. This causes unrelated hosts to appear, despite the filter bar showing the correct host.

Environment:

• Zabbix version: 7.4.6 (also reproducible in 7.4.5)

• Frontend: Web UI

• Backend: Zabbix server on Linux

• Browser: Chrome/Edge (issue persists across browsers)

Steps to Reproduce:

1. Go to Configuration → Hosts.

1. Select a specific host (e.g., fap001prd).

1. Click on Items or Triggers tab.

1. Confirm the filter bar shows the correct host.

1. Click to go to page 2.

Expected Behavior:

• Page 2 should continue showing items/triggers only for the selected host.

Actual Behavior:

• Page 2 loads items from multiple unrelated hosts.

• If query triggers, page 2 will display a new host and original host is gone
• In some cases, dozens of pages appear unexpectedly.

Impact:

• Breaks usability for large environments.

• Makes host-specific troubleshooting and configuration error-prone.

• Affects both monitoring and template validation workflows.

 
Workarounds Attempted:

• Upgraded from 7.4.5 to 7.4.6 → issue persists.

• Reapplying filters manually → temporary fix, not scalable.

• API queries → functional but not user-friendly for daily use.

• In the URL, add a "&page=2" works.