which trigger expressions generated events ?
I was very basic Agent trigger and system was warm up and running when I turned monitoring on again.
Trigger: Zabbix agent on X is unreachable for 5 minutes
Trigger status: PROBLEM
Trigger severity: High
Trigger URL:
Item values:
1. Agent ping (X:agent.ping): Up (1)
2. UNKNOWN (UNKNOWN:UNKNOWN): UNKNOWN
3. UNKNOWN (UNKNOWN:UNKNOWN): UNKNOWN
this is not about disabled hosts being alerted on but events being generated on new/just enabled hosts. there is an issue about it that i just can't find right now 
leaving this issue open until the original one is found
Sounds similar to ZBXNEXT-1565
ZBXNEXT-1565 is about already running escalations and maintenance - this is about adding a new host (or enabling a previously disabled one) and getting alerts from nodata() and similar triggers
Yes, I have monitored this host few days OK, and maybe I did it wrong way to maintain it, but I change state not monitored - do my job - and change back to monitored. Maybe this has same root cause?
Eino, we steel don't see the trigger expression.
Taking into account your trigger name (it looks like a build in 2.0 setup) I suppose your trigger expression is:
{Template App Zabbix Agent:agent.ping.nodata(5m)}=1
I guess Rich meant ZBX-4476, feel free to close 
<richlv> exactly that issue, closing
Fix then ZBX-4476 to affects versio 2.0.6 too
we usually consider that issue is still ongoing if not closed, but sure, added 2.0.6 to that one