Featherwand - S2-E3
Other mistake: When Bingo pushes the ball down the stairs, watch as she turns her head. Her snout glitches as if the animation was smeared.
Featherwand - S2-E3
Revealing mistake: When Chilli and Bluey both run down the stairs before the ball catches them, if you look closely when Bingo turns her head around, her mouth is completely glitched for a split-frame.