One super-frustrating UX choice in @Mastodon's "advanced web interface" is that if I click on a post in my Home column to expand it and read replies, the post loads in another column (it has no label and I don't even know what to call it) and the Home column for some insane reason resets its position to the top.
So effectively, I pretty much never manage to read everything that came into my home column while I slept because any time I want to read something in more depth the column resets to the newest posts and eventually I get tired of having to scroll through stuff I've already scrolled through multiple times to find my way back to the older unread stuff.
This has got to be someone's intentional choice to have it do this and it's a terrible experience. The column should stay scrolled to the position of the post that's been clicked on and not take away the user's control over when to go to the top of the timeline.