@admitsWrongIfProven
Yeah, that's one of the things I hate about Fedi — no guaranteed delivery. When you're already following each other, at least you can check the other instance for your reply, but when interacting with new people, it feels weird — no way to tell if you're being ignored or if your reply just didn't go through.
I'm kinda expecting this to happen when I'm using my own slo-o-ow instance, but this one usually works fine unless it starts rate-limiting.