The End of Flutter Valley (3) - S1-E3
Audio problem: As the Flutter Ponies discuss how to escape from the giant honeycomb they are trapped in, Rosedust addresses the Flutter Ponies. Yet Rosedust is in the audience and Honeysuckle is addressing the group in Rosedust's voice.
Shito! Kyofu no kokushiken - S1-E11
Audio problem: Hyoga butts in with "What did you say you just saw, Ikki?", but Ikki was THINKING that phrase about seeing the battle, not saying it out loud - unless he was practicing ventriloquism without an audience. (00:21:50)