Hello,
have this very weird issue
When we run
OMD[com]:~$ snmpwalk -v3 -l authPriv -u SNMPUSER -a SHA256 -A '&xxxx#' -X '&xxxx#' -x AES 11.22.33.44 SNMPv2-SMI::mib-2.81
SNMPv2-SMI::mib-2.81.1.1.0 = Gauge32: 10
Timeout: No Response from 11.22.33.44
but when I apply a timeout of 2sec
OMD[com]:~$ snmpwalk -On -t 2-v3 -l authPriv -u SNMPUSER -a SHA256 -A'&xxxx#' -X ''&xxxx#' -x AES 11.22.33.44 SNMPv2-SMI::mib-2.81
.1.3.6.1.2.1.81.1.1.0 = Gauge32: 10
OMD[com]:
we get no TimeOut Error, so far so good, this timeout needs to be implemented
When I apply this in a snmp time setting rule stuff doesn’t want to work
Now the funny part 
When I disable snmpsection “inv_lldp_cache” stuff works … I mean I can discover my host and enable the services
Really clueless …