Netflow Insight mixes up OpenVPN interfaces

[oparoz]

In my list of interfaces I've selected

• wan
• a few OpenVPN connections
• a couple of VLANs

In my list of "Egress only", I've selected

• wan
• all the OpenVPN connections selected above

In Insight, I see all my interfaces for IN, but only a few for OUT and at least one of them has the wrong label.
Here is what I see in OUT

• wan
• the VLANs
• one OpenVPN connection with the wrong label

I know the label is wrong because lots of traffic is going in and out of a different VPN connection and it's reported as such by the traffic page.
I would expect to see all the active VPN connections in OUT, but looking at the details in the "Top usage ports", I can see that the Out is 0 for the interfaces which are missing from the graphs, which is incorrect.

Also, I'm not sure what wan is supposed to show. wan OUT seem to aggregate all the connections, but IN is not.

I'm using gateway groups for the VPN connections, so maybe the collector is having a hard time matching traffic measured at the hardware level with the virtual interfaces?