The thing is the missing comments are all in English, and they affect entire posts and not just certain commenters so it probably isn’t related to the language setting for individual comments, otherwise only certain comments would be missing and not the whole thread. Plus I already have all languages enabled. As a test I also found one commenter from an empty thread and viewed other posts they commented on and both their comment and everyone else’s showed up. If it was related to people marking their comments wrong I would expect it to affect their comments on other threads too.
I’m curious if the problematic posts are the same for others, for example this thread with 60+ comments is one that shows empty in sync but with the correct comment count: https://lemmy.ml/post/22091314
And this post too with ~20 comments, also all in English: https://lemmy.ml/post/22089346
I double checked and my account settings on the web UI have all languages selected, and sync even shows the correct count for comments, just doesn’t display any of them.
Lmao the first thing that came to mind was the “is there anyone else you forgot to ask” meme with apple in between the user and app developer.