ProLiant Servers (ML,DL,SL)

DL180 g9 over SNMP reports as failed

Occasional Visitor

DL180 g9 over SNMP reports as failed

We have multiple servers proliant servers and now I am testing zabbix SNMP reporting.
Now I am connected just 8 servers for testing (all identical DL180 G9) and reporting works fine in 7 of them, but one reports as failed over SNMP while on ILO webpage it says that everything is fine.

I am using "CPQHLTH-MIB::cpqHeMibCondition.0" parameter. As I mentioned it works fine in 7/8 servers and reports (4 -  failed) only in one. Any ides? 

Restarting ILO works just for a few moments and afterwords it's failed again.