As quoted from the linked post.
It looks like you’re part of one of our experiments. The logged-in mobile web experience is currently unavailable for a portion of users. To access the site you can log on via desktop, the mobile apps, or wait for the experiment to conclude.
This is separate from the API issue. This will actually BLOCK you from even viewing reddit on your phone without using the official app.
Archive.org link in case the post is removed.
This actually just helped me make the connection. Whenever I was consciously trying to close the app because I had something else to do I would always make sure to say “one more” then not scroll even a little past otherwise I’d want to keep scrolling to see what was hidden.
If I’m in this situation again I’ll make sure to turn paging on. I am not sure mlem (lemmy app) supports this, though.