Our Very First Show, Again - S1-E1
Audio problem: After Stephanie takes back the flash drives she gives to Max and Jackson, Max tells D.J. that he knows all the bad words. When we hear him say "Donald Trump," his lips do not match it. (00:06:40)
Chapter Four: The Moveable Feast - S1-E4
Audio problem: When Father Keane is speaking with Mother Bernadette outside, when Mother Bernadette says "The gift doesn't reside in you or me", and "Where you coerce and compel, we use compassion, forgiveness, and patience", her lips do not match what she is saying.
Audio problem: Diana talks to one of her sons, who's hiding inside playing Street Fighter II. You hear the sound effects playing that belong to the characters either Ryu or Ken: "Tatsumaki" (Hurricane kick), and "Shoryuken" (Rising dragon fist). When the shot cuts behind the son, you see the characters of Blanka (green guy) and E. Honda (the sumo wrestler). Neither of those characters can do either of those attacks, and there wasn't time for him to switch which character he was playing as. (00:23:39)
Chapter Five: The Flayed - S3-E5
Audio problem: When Joyce, Alexi and Hopper go to Murray's, Murray points a double barrel shotgun at them and it makes a sound of a pump action shotgun.
Audio problem: When Janet is talking to Michael about how she loves Jason, there is a shot looking at Michael with Janet to the right. Janet is talking but her lips aren't moving.