If you look at https://en.wikipedia.org/wiki/Special:BrokenRedirects or https://ru.wikipedia.org/wiki/Special:BrokenRedirects you can not tell the redirect to existing page from the redirect to non-existing page (as on 2023-11-13 enwiki page lists two redirects Wikipedia:VAND (which has been fixed) and Wikipedia:Example of a broken redirect (which is intentionally leads to red link) but visually they look the same way. On the ruwiki page when I'm writting this passage first redirects is working normally, second has been deleted and third points to deleted page. At least a week ago this feature worked as expected, but as far as I can see on 10th of November (after installing 1.42.0-wmf.4 version?) it has been broken.