I've been browsing elsewhere on Stack Exchange, and I noticed that a few questions that have been migrated redirect to Literature via their post numbers - as they should. An example is What order should the Chronicles of Narnia books be read in?, on Science Fiction & Fantasy Stack Exchange. There is a link on the notice, which normally leads you back to the original question (and its revision history):
The issue seems to be that the link redirects via question ID. That link brings you to the page
https://literature.stackexchange.com/posts/2/revisions - which now redirects to the revisions of a totally different Literature question. Another case I've seen is, of course, Why did Literature fail?.
I don't know how widespread this is, or how many questions were migrated, but I'm assuming that this is not the desired behavior, and could end up getting confusing.
Playing around, I noticed that old chat oneboxing also sends you to the wrong questions (starting here). I don't think that's going to be an issue, but it does show that there are various other ways in which the ID links fail.