Steps to reproduce:

1. Download and import the https://share.zabbix.com/cat-app/backup/veeam-agents-for-microsoft-windows Template
2. Add this template to hosts under a proxy 
3. Wait to fetch veeam Eventlog after backup

Result:
some host (windows with agent) under the proxy is reporting correctly all eventlog 

other host are reporting

"Cannot evaluate expression: "Cannot evaluate function "HOSTNAME:eventlog[Veeam Agent,,,Veeam Agent,190,,skip].nodata(259200)": item does not have enough data after server start or item creation."
Expected:
Every host report correctly the eventlog for VeeamBackup

I've tried zabbix server 3.4/4.4, appliance and self installed from packages

i don't know why some host aren't reporting the data correctly