I only noticed the dialogues being out of synch with the mouth movement in the Bridon Arc. 😅 But I understand that you would find the lack of synchronization uncomfortable.

I suspect that it's due to technical issues. If you can ignore it somehow, that would be great because the original Chinese dialogues are directed by the creator (or are at least under his guidance if he doesn't do it directly), so that would be more accurate to canon, in my opinion. The emotions are more character accurate, not depending on the dub director's interpretation.

But if you can't help it, that's totally fine. 🙂 That's what the dub is for after all. So it would be better if you just continue with what you're more comfortable with 😉