Zabbix IT Services feature set

[johnstong at westmancom.com (Graham Johnston)]

Hi,

We have the Zabbix IT Services (running on Zabbix 3.2) configured for some test groups. Â It usually returns good data but occasionally it seems that one service group or trigger will get stuck in an alerting state and provide an incorrect SLA. Â This can occur if the trigger has changed to a problem state and then back to OK but the IT services doesn't reflect that change. Â It will occur where the top level group will show as having 100% problem time and the sub groups and items either have no problem time or such a small amount that it wouldn't indicate 100% problem time.

We have it built with some groups under root, some sub groups and items and the items will have a trigger associated with those items. Â We followed this article to the best of our knowledge: https://www.zabbix.com/documentation/3.2/manual/it_services
 
For Example:Â 
|Data Center 
|-Core1
|--Core1 - ICMP - Trigger
|-Core2
|--Core2 - ICMP - Trigger

Each subitem is a child of the item above it. Â We haven't configured any dependencies to any other groups or items.
My question is, has anyone gotten the Zabbix IT Services to work correctly? Â Is there a trick to getting it to work, some configuration we are doing incorrectly?

Thanks,
Graham