Audio problem: They went to an investigator to let him listen to the audio. The audio with the woman screaming and the gasp, the gasp was Zak, not another apparition.
Bloodshed in the Bordello - S20-E12
Continuity mistake: Zac goes in a playroom to investigate, puts a truck on a playhouse roof and tries to get a presence to push it off but nothing happens. He walks around to investigate the rest of the room. He squats down to look inside of a tent and when he does the camera pans out to show Billy in the doorway. When it does the truck is not on the roof of the playhouse, but when Zac stands up and walks by the playhouse, the truck comes flying off it.