This is a weird one that's only happened since all the recent changes:
I'm on the app, on iPhone 12 IOS 15.4.1
When I look at a thread, chose only OP posts and then reverse it to see the most recent post..... I can't bookmark it. I can bookmark the 2nd last post, but not the last.
BUT I can bookmark it if it's not reversed.
Doesn't bother me that much, but thought you could add it to the list of things that need looking at.
Good luck figuring that one out! 😂