While testing the merge deduper, it seemed to not always report all the involved interfaces in flows. Here's my reproducing steps:

1. I'm running with a 6-nodes cluster, ocp-4.15-rc5
2. Deploy netobserv with sampling 1 and other default settings (merge deduper DISABLED)
3. Deploy mesh-arena: `kubectl create namespace mesh-arena ; kubectl apply -f https://raw.githubusercontent.com/jotak/demo-mesh-arena/main/quickstart-naked.yml -n mesh-arena`
4. Open netobserv console, in Flows table tab, set filter Destination Owner Name = "ui-base".
5. You should see a bunch of flows, focus on one that has Node Direction "Ingress" or "Egress" (not Inner) and add a filter to its source
6. If you query last 5 minutes, you should get around ~60 flows

1. Now in Query options, click "Show duplicates": the number of flows doubles/triples, and we can see that 2 interfaces are involved

1. Then enable merge deduper in Flowcollector:
2.       advanced:
           env:
             DEDUPER_JUST_MARK: "false"
             DEDUPER_MERGE: "true"
3. Back to the console, refresh (perhaps clear cache), wait a little bit for new flows to come. There's only one visible interface. The other has disappeared, and it's not in the Interfaces list. It should be there.