I've been having a lot of intermittent issues. I have heard that making an account on a smaller instance and then using it to view lemmy.world content pretty much resolves the issues but haven't tested it myself yet.
It's definitely on lemmy.world my other account on programming.dev working like normal. I think lemmy.world is at like 90k users. That was some quick growth, it was going to be hard for the adminis to scale that quick.