The Prison Prep School Murder Case File 3 - S1-E12
Audio problem: Someone "accidentally" drops an eraser, drawing the teacher's attention. It's a soft pencil eraser with no additional parts, but it falls with a clicking noise as if it were made of hard plastic. (00:08:30)
The Campground 'Bizarre' Case - S1-E17
Audio problem: Having reached the campground sign, Juri Takano shouts at the others that they are almost there. Her mouth animation comes about a second before the sound starts. (00:06:50)
Inspector Kenmochi the Murderer File 3 - S1-E21
Audio problem: Kindaichi is listening to the recording of the phone call a couple times over; however he does not listen to it in a loop, but rather the file shows up as lasting 52 seconds, with the call being just a handful of seconds. On top of that, when he listens to it again in front of the building, the timestamps don't match.
Inspector Kenmochi the Murderer File 4 - S1-E22
Audio problem: Busujima screams that he's not lying when the police inspector reminds him that Marina Togami's torture happened in his apartment. Despite the scream, his jaw is totally still in that shot (camera behind him, above the shoulder). (00:10:15)