The left-arrow next to a forum thread title takes you to p. 1 of the given sub-forum, rather than to the page you were on.
For example, navigate
to Community
=> Forum
=> Lichess Feedback
=> page 2
press that Back-to-Forum button
- you are returned to page 1.
For example, navigate
to Community
=> Forum
=> Lichess Feedback
=> page 2
press that Back-to-Forum button
- you are returned to page 1.