With today's update, we've improved the look of the alt text modal you see when composing new posts on #Mastodon, and added some information about the significance of alt text for accessibility and how to write it.
@fae2535 Because that's how federation works. Your own server may not have seen all the responses from other servers yet. It's a technical limitation of not being a centralised service.
Thank you for the answer
@fae2535 No worries. It's one of those quirks of the platform - it's not obvious why it'd be that way.
Mastodon isn't "one giant thing" like Twitter. When you post, it takes time for other servers to know about it. Same for replies to posts. Not all servers know about each other, so replies from one of those places might be missing for you - unless you go to the same server as the person who's post you're looking at.
TLDR: A nerdy weirdness of the system.
It usedn't to be like that.
I feel that it changed between yesterday and today. But not sure. Thanks!