A.2.12 Point ends up inside invisible text when jumping to a file-visiting buffer

This can happen when you type RET on a hunk to visit the respective file at the respective position. One solution to this problem is to use global-reveal-mode. It makes sure that text around point is always visible. If that is too drastic for your taste, then you may instead use magit-diff-visit-file-hook to reveal the text, possibly using reveal-post-command or for Org buffers org-reveal.