ygg on Nostr: How does reply delivery work? I got in the habit of "View on remote instance" to ...

How does reply delivery work?
I got in the habit of "View on remote instance" to avoid saying things that were already said because so many replies don't appear. They're not from blocked servers - sometimes they're even from the same server as the original post
So what determines whether they load, and are there plans for this changing in the future?
#fediverse #fedihelp