That ain't a bug. You've hidden every post in-between pages.
This is Lemmy's way of telling you to take a break lol. In all seriousness, there probably is a finite end to posts sorted by "Top X" when you look at the entirety of posts that fit that criteria. Idk how the different sorts are scored but the theoretical max of all posts would only be those that had interactions and upvotes in that period.
I'm just speculating so don't take this as the truth.
Maybe you just finished the whole feed hahaha
What happens if you try other sortings?
The only way to fix this is to post more content in that 6 hour period.
Just disable page dividers.
I have page dividers disabled and still see them
How can I do that?
You could try turning off Settings shortcut: Post options > Display page dividers
I've said it before but this linking feature is so cool. The community is so effecient at helping each other.
