Sadly, it's not fixed it. Although I've noticed it's community specific...
I think I got rate limited when I used a python script to migrate my subscriptions (some 503 errors) but most of them came through. My new account still gets this post from a year ago (https://feddit.uk/post/321952) as my 4th hot post. Along with a number of 1 year+ old posts below. However, after looking into it looks like they are all from Programmer Humor@lemmy.ml. Going back to my original account, which has my full subscriptions, again they seem to be from some specific communities:
ADHD memes@lemmy.dbzer0.com
Programmer Humor@lemmy.ml
Gaming@kbin.social
Gaming@lemmy.ml
CasualUK@kbin.social
Cathode Ray Tubes@kbin.social
I'm going to unsubcribe from these for the time being, and see how I get on.
This started happening with another community. After looking there is an open issue on GitHub. Looks like it is impacting smaller servers more than larger ones?
https://github.com/LemmyNet/lemmy/issues/3428