CACTI F5 VS Graphs empty

[Pgayrard]

Our Cacti server is unable to display F5 VS/VIP packets and traffic in view, graphs are empty.
Most of other F5 Global graphs work successfuly : F5 Global traffic, F5 Global Packets, F5 CPU, F5 Memory.

For the failing graphs, in the query we receive VS lists with names (graph are created), but graphs are empty.
On VS graphs for F5 VS we can see Inbound or Outbound traffic populated with -nan values.
Cacti version 0.8.8h.
F5 is a F5 i5800 version of OS 12.1.3.1
OS version of server running Cacti : Debian_version 9.6
We tried several templates : V9, V10 and V11,
we also tried SNMP V1 and SNMP V2 without success.

[netniV]

You should probably check the OID's being used by the templates using SNMPWALK to make sure that there are actually values to collect.