Savage Land, Strange Heart (1) - S3-E8
Audio problem: Storm's upper and lower lips are completely separated and her teeth clenched when she says "I am free!" She wouldn't be able to say the words "am" and "free" without touching her lips together. (00:12:20)
Savage Land, Strange Heart (1) - S3-E8
Continuity mistake: When Beast contacts Rogue on her wrist communicator, you can see she is wearing the usual yellow gloves, green sleeves and brown jacket of her uniform. When the shot changes, she is wearing the long-sleeve blue shirt without gloves that she was wearing earlier in the episode. (00:07:40)
Savage Land, Strange Heart (1) - S3-E8
Audio problem: When Sauron says "Ka-Zar, I warned you!", Ka-Zar is actually the one mouthing the line. Note: this mistake may only apply to the DVD version of the episode. Sauron is the one mouthing the line in the Disney+ version of the episode. (00:02:40)
Savage Land, Strange Heart (1) - S3-E8
Continuity mistake: At the very beginning of the episode, Sauron can be seen wearing the necklace of Garokk. Not only is he not wearing the necklace a few shots later, but he isn't even supposed to have the necklace until a few minutes later in the episode when Zaladane gives it to him after he reverts to his human form. (00:01:05 - 00:04:10)
The Phoenix Saga (3): Cry of the Banshee - S3-E5
Other mistake: When the text depicting the episode name appears on screen after the opening credits, it says "The Phoenix Saga Part 2, The Cry of the Banshee." It should read "The Phoenix Saga Part 3, The Cry of the Banshee." Note: this mistake may only apply to the DVD version of the episode. The episode that appears on Disney+ correctly depicts it as "Part III." (00:02:20)
The Phoenix Saga (5): Child of Light - S3-E7
Continuity mistake: Throughout the first four episodes of "The Phoenix Saga" Lilandra has a slightly robotic effect to her voice. In this episode the effect is absent.
The Phoenix Saga (5): Child of Light - S3-E7
Continuity mistake: When Ch'od asks Corsair what is happening, his normally green lips are colored white. (00:04:10)
The Phoenix Saga (4): The Starjammers - S3-E6
Other mistake: When the X-Men and Corsair encounter D'Ken in the hallway, D'Ken, Gladiator and Lilandra remain in the background while the X-Men and Corsair are wiped from the screen. It's as if this was meant to be a zoom in on D'Ken, Gladiator and Lilandra, but their size relative to the camera remained the same and the X-Men and Corsair are simply removed from view. (00:19:35)
The Phoenix Saga (5): Child of Light - S3-E7
Continuity mistake: After the Starjammer has crashed onto the surface of the world inside the M'Kraan Crystal, Cyclops is missing his gloves. (00:07:50)
The Phoenix Saga (5): Child of Light - S3-E7
Continuity mistake: When Cyclops says "What can we do?", Wolverine's bare arms are the same yellow color as his outfit. (00:03:40)
The Phoenix Saga (4): The Starjammers - S3-E6
Other mistake: When Gambit is tossing playing cards in Lilandra's helmet, he is shown tossing four cards. All four cards are the exact same card (the ace of spades). (00:13:30)
The Phoenix Saga (4): The Starjammers - S3-E6
Continuity mistake: When Corsair first enters Cyclops' holding cell, the door says "Security Cell 3." When Corsair leaves the room, the door simply says "Security Cell." (00:09:00 - 00:13:15)
The Phoenix Saga (2): The Dark Shroud - S3-E4
Continuity mistake: The tops of Juggernaut's boots change from brown to orange after he bursts into Professor X's room. (00:20:30)
The Phoenix Saga (4): The Starjammers - S3-E6
Audio problem: When Phoenix says "We must movie quickly to safeguard the crystal," she is speaking in Lilandra's voice. (00:06:10)
The Phoenix Saga (4): The Starjammers - S3-E6
Continuity mistake: In the group shot when Phoenix says "of lives beyond measure," Moira McTaggert's hair is blonde and Wolverine is missing his gloves. (00:04:25)
The Phoenix Saga (3): Cry of the Banshee - S3-E5
Continuity mistake: The yellow paint for the "H" marking on the helicopter pad on the roof of the Muir Island Research Center becomes smaller when the shot changes. (00:09:20)
The Phoenix Saga (3): Cry of the Banshee - S3-E5
Revealing mistake: When Professor X is telling Juggernaut that he is in his mind, if you look closely you can see there is a disembodied mouth on the right side of Professor X's face that is synchronized with his dialogue. Apparently an animation error. Note: this error may only apply to the DVD version of the episode, as it does not occur on the version of the episode that appears on Disney+. (00:04:00)
Continuity mistake: Wolverine's 5 o'clock shadow disappears and reappears throughout the episode.
Continuity mistake: Beast is present when Gambit destroys the Spirit Drinker. When Professor X arrives moments later, Beast is shown to be approaching the scene with him and then notes that the Spirit Drinker seems to be missing. (00:18:45 - 00:19:25)
Continuity mistake: Gambit is missing his gloves when Jean Grey stops him, Wolverine and Cyclops to tell them what Professor X told her about the alien ship. (00:15:20)
Answer: Chris Potter, the original Gambit voice actor, did indeed quit the role in the 4th season. His last episode was The Phalanx Covenant Part 1 so it seems reasonable that Fox would limit the use of the character even though it was recast. It doesn't appear that Potter left the role due to animosity, he stated in an interview that he wished to play Gambit in the first live action X-Men film.
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