That does seem like it would cover some cases. In my case, I'm noticing this with instances I'm fairly confident my base instance federated with, because other posts from the instances are visible to me. For example, I didn't get a notification for your reply, but looking from Beehaw I was able to paste the link and find it that way. For other instances, I have no luck trying the same thing, even if I try pasting the post or the community first, despite having other posts from the same time period and instances accessible to me.
A practice like allowing or disallowing downvotes cannot on its own be judged "healthy" or "unhealthy".
Some feedback to see if this is similar for others. First I tried searching 'skypictures' and only this post came up. Then I tried '!skypictures@lemmy.ml' and got nothing. Lastly I tried 'sky pictures' and it appeared, but with only one post instead of two.
I might be experiencing something similar. I saw different posts under "All" before and after logging in, even using the same sort ("New"). But in both cases I'm viewing from my home instance.
Update: For example, I subscribe to !socialism!socialism@beehaw.org and saw multiple posts from my home instance before logging in, but now only one is showing up.
I'm noticing the same thing for some (but not all) subscriptions to communities on other instances. I'll try retrying for some of them though, hadn't considered it.
Update: Not sure if I'm just lucky but clicking 'Subscribe Pending' then resubscribing appears to have fixed all of them.
There was another post about them abandoning all their Mastodon instances for a while (like over a month) until a bunch of people complained but I'm not sure how to find it. I think this article is from before that happened.
@yaspora
@baraza.africa