Steps to reproduce:

'{"jsonrpc":"2.0","method":"trigger.get","params":{"output":"[triggerid]","expandDescription":"true","filter":{"description":"Host name of zabbix_agentd was changed on Zabbix server"}},"id":"1","auth":"441df3e33ca158d1f0389d934028e4ad"}'

Result:
{
  "jsonrpc": "2.0",
  "result": [],
  "id": "1"
}
Expected:
{
  "jsonrpc": "2.0",
  "result": [
    {
      "triggerid": "13648"
    }
  ],
  "id": "1"

Original trigger name:

Host name of zabbix_agentd was changed on {HOST.NAME}