Ha. Never saw that message without any Error Related. As i see you have already latest Patch Level that's fine. Maybe that's a Bug of the Version. you have 2 nic's per vSwitch?.
could you test if you see something over Powercli?
$myhost=get-vmhost "myhost"
and to check if something back on
$myhost.extensiondata.configStatus
$myhost.extensiondata.OverallStatus
$myhost.extensiondata.ConfigIssue
thx
Max