Sorting posts not working at all, some communities not updated.

cross-posted from: https://lemm.ee/post/32751730

So I had made a post regarding sorting posts not working, but I have noticed another issue where some communities just don't have some older posts. I have tried both on web and on android app, and it's the same, tweaked some settings too. A demo video (GIF) showcasing the problem and my account settings are attached in below Imgur link: https://imgur.com/a/8X8AQpI