在主题列表中，作为普通用户，单击已加书签主题旁边的书签图标以将其固定没有任何效果

[Moin]

Seems the pin icon does not appear anymore.
I think now the bookmark icon always takes you to the first post of the topic and not the post you bookmarked.

The behavior is the same at desktop and moblie, and at /latest, /top and /categories .

But it does not fit to the statement in the other topic. The title takes you to the unread posts and the bookmark to the first post.

Tapping the bookmark icon next to a topic title on mobile does not work

This is intentional. On mobile the entire topic title is the target, because we don’t think someone’s finger can accurately target such a small hit area. On desktop, laptop, etc there is a more accurate pointing device and smaller areas can be targets. I suggest visiting the bookmarks tab in your user profile to jump to bookmarks on mobile.