Hmm it seems weird need to debug it 😅

I have tested using nak manually

nak req -k 1 -l 2000 wss://nfrelay.app/?user=activitypub | grep -v activitypub

It gives 0 since the returned events because all the returned value were all from mostr.

While

nak req -k 1 -l 2000 wss://nfrelay.app/?user=activitypub | grep activitypub

Show all the activitypub events