Broken Connection between services when Elastic used for Tracing

[bfaccruent]

Hi

I am trying different collectors for Traces. I tried Jaeger and it shows correct connection or dependency between services.

However when I moved from Jaeger to Elastic, it does not show the dependency between the API and Sampler Worker :

I am using NService instrument ("NServiceBus.Extensions.Diagnostics.OpenTelemetry") from the API and it also referenced by Sample Worker.

What could be the reason ?