Zenoss 4.2.5 events suppress - does not work as expected

Helo,

Zenoss 4 event management paper says:

zenping:

".... All other device availability monitoring is dependent on ping access. Once a ping has
failed, SNMP, process, TCP/UDP service and windows service monitoring will all be
suspended until ping access is restored. The count field of the higher level monitoring
events will not increase until ping access is resumed. ..."

In my case (zenoss 4.2.5), evrey time when device goes "ping" down, after cca 1 min device goese "snmp" down and count one or two time for snmp. Does anyone know why events suppresss does not work well In versioan 3.1.0 thath work fine.

Thank You,

Toliceli