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
Audio problem: When D'Ken is ordering Gladiator to identify himself, he is speaking in a voice that sounds more like Dr. Corbeau from a few episodes earlier than it does D'Ken. (00:09:20)
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.
BaconIsMyBFF