Now that 2 extremely experienced PHP devs are running a GNU Social instance, perhaps we can #FixIt.
Well, if the problem isn't on Misskey's side that is.

The other oddity is that I couldn't find this message on the .moe side for whatever reason, so I had to find it on .ne.jp, middle click on the timestamp to open it in .moe, and then I could see it.
So I guess there's quite a bit of problems to fix.