Selecting 'Take me to the beginning' in 'Content View Behavior' (Member's Account settings), will not take you to the beginning as expected, but you will be taken to the last post of the topic.

Both 'Take me to comments I haven't read' and 'Take me to the latest comment', work as expected.

Thank you for bringing this issue to our attention! I can confirm this should be further reviewed and I have logged an internal bug report for our development team to investigate and address as necessary, in a future maintenance release.