Partial scraping when using /federate

Hello

We have federation with 2 Level. We have added a new target to federate on the aggregation prometheus. The collect for this new prometheus return only some metrics for some hosts (always the same).

I have take wireshark trace of the request received on the new prometheus and i can’t see any diff with other collected prometheus. I can see that the answer is partial (on pcap trace) with 200OK. When we send the same request using curl from the same source to the same prometheus the answer is complete.

Log don’t show any problem.

Did you have an idea on which side the problem is ? How could we investigate this problem?

Best Regards

Olivier