I have pull requests for other changes to do with federation. I have a branch with this change in, but I've so far not made it a PR because I didn't consider we should need to change this, and also because there was a patch on Lemmy's side already available. Lemmy.ml, lemmy.world, beehaw.org are all working correctly now for example.
But if this is going to go on for long, I may well turn it into a PR too and see what people think.