@Gargron @drq idk, I have incomplete threads for boosts all the time.

For example, here's a post you recently boosted as seen by my instance, zero replies: https://friends.grishka.me/posts/17150
Here's it on its home instance, a bunch of replies: https://glitch.social/@powderpaint/104434241405405911

Your own posts appear to have more-or-less complete threads, though, I just checked a bunch.