The issue only started occurring recently.
Usually, when clicking on a link to a specific answer/comment, the new page automatically scrolls to a position where the answer/comment is shown at the top of the visible screen. However it recently started going all the way down and directly present me with the bottom of the page.
I have not found a stable way to reproduce the problem, but I promise it is there. It confused me for quite a while, and made me hesitate for another while before posting this question here. In general it has a higher chance to occur on comments, and on a significantly higher chance on links where another link to another item on the same page has this issue.
It occurred on two of my Android phones running A 5.1 and A 7.1, Google Chrome 52, 58 and 64 (all from Play store), so I guess it's not my fault.