The Phantom Apprentice - S7-E10
Continuity mistake: During Ahsoka and Maul's duel, just before she kicks him through a wall, he's pushing her down with his double-bladed lightsaber while she's resisting with her two lightsabers. In a shot from behind her, she has one blade on each side of the handle of his lightsaber, but a close-up of her shows both of her blades on the same side. (00:20:19)