I don't think there is a bug here, just confusing page names and contents on Wikipedia…

You originally transcluded the page "Wikipedia:Help Desk" (note the uppercase "D"), and that's where the "fake" edit link pointed. That page is a redirect to "Wikipedia:Help desk" (lowercase "d"), but also contains… a bunch of very confused-looking comments about cite errors from 2014? which is what you saw in the edit window. https://en.wikipedia.org/w/index.php?title=Wikipedia:Help_Desk&redirect=no

The transclusion automatically follows the redirect, but since the edit link is manually generated by the template, it does not.

When you corrected the transclusion and link after the section was archived, you also fixed the "D" to "d": https://en.wikipedia.org/w/index.php?title=Talk:Noah%27s_Ark&diff=next&oldid=847378126

@matmarex Greetings Earthling. If the confusion was capitalization of "d" then why only the edit window got confused and not the transclusion itself?

@Thinker78 Transcluding pages using {{...}} follows redirects automatically, the same as linking to them using [[...]]. This is what allows template redirects like https://en.wikipedia.org/w/index.php?title=Template:Fact&redirect=no to work.

However, editing pages (e.g. https://en.wikipedia.org/w/index.php?title=Template:Fact&action=edit) does not – if it followed redirects, it would be impossible to actually edit the contents of redirect pages.