I’m still wondering on this. I suspect it has something to do with refreshes between instances - as if this instance isn’t yet away of that community. It’s always in foreign instances, regardless.

I had a few that didn’t work, then I tried them again a day later and they went through. However I’ve had others on major instances that still haven’t come in (eg /c/asklemmy@lemmy.world).

I’d love to hear @sunaurus’ opinion on this.