At 21:44 June places a cassette tape into a cassette player with the tape in the cassette on the right side which is the wrong side. The cassette would not play in this condition, and instead the play button would pop back up. In cassettes the tape starts on the left reel and as it plays is spun around the right reel. It's possible June might not have realized this, but she is not seen fixing the issue because the cassette still plays.