Can you share an example or screenshot of what you mean around the rendering issue in merge requests?

As for the issue redirects - it does stink. It's an artifact of our move to a single code base for CE and EE [1]. A lot of issues have long-standing SEO so the "old" issue often comes up in a Google search.

[1] https://about.gitlab.com/blog/2019/08/23/a-single-codebase-f...