ApplicationInsights broken on multi - node setup

[enicky]

I currently have the following setup :

• Local Service Fabric : Code Version 9.0.1017.9590
• Microsoft.ApplicationInsights.ServiceFabric.Native 2.3.1
• Microsoft.Applicationinsights 2.20.0

I also setup the following to have a workaround to keep the correlation working on the ServiceFabric :

Activity.DefaultIdFormat = ActivityIdFormat.Hierrachical;
Activity.ForceDefaultIdFormat = true;

This "works" when I use a local development setup with a single node :

But it didn't work on the test environment and we ended up with some parts not being correlated to their parents... In the end I was able to reproduce this locally.

And when I look at the activity id and its ParentId, it has this strange notation: I don't get where those .1.1.1.1.1.... get from :

Did someone encouter this also ?

Is there something I can do to prevent and fix this ?