Sorry for taking so long to respond, it happened that this event didn't show up for me at all given the fact that I have a very strict set of relays advertised as "inbox" relays on my kind 10002 event and my main client, https://github.com/mikedilger/gossip, only checks these relays for events tagging me.

I'm using this opportunity now to say that clients should relay on that information in order to choose the relays they're going to use to publish events when replying to someone or tagging someone. Thank you.