I don't know if it's an issue with Netflix itself, or it's the receiver on our television, but the shows we watch have had slight hiccups that then desynchronize the video from the audio. In some cases, we'll see the characters' lips form a word before we hear it. In others, the sound will come a half-second before the action that made it.
It really bothers me. The problem will go away if I stop the video and then play it again, but it will pop back up again in a few minutes. One saving grace is that we watch with the subtitles on, so we can still follow what people are saying despite the distraction (although we had a problem with the subtitles being desynchronized when we watched The Expanse earlier this year).
I suppose this is another reason why I still prefer DVD to online digital.