
Continuity mistake: When Gambit is saying "Now what do we do?" after throwing a kinetically charged card at the Spirit Drinker, the glove on his left hand is suddenly missing. (00:07:54)

Continuity mistake: When Jean tries to probe the Spirit Drinker's mind, she is standing several feet from the wall on her left. When Cyclops checks to see if she's all right, she is suddenly much closer to the wall. (00:12:07)
Revealing mistake: When Beast states that it appears safe to enter the alien ship, his right arm and right leg completely pass through Professor X's body and hover-chair respectively. (00:13:45)

Continuity mistake: When Beast and Xavier first enter the alien craft, Beast's black eyebrows are incorrectly colored blue for a couple of shots. (00:13:58)

Continuity mistake: The warning sign on the containment vessel inside the alien ship disappears in the wide shot. (00:14:40)
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)

Continuity mistake: Gambit's black cowl is suddenly blue when Jean Grey is explaining that the alien spacecraft is a prison ship. (00:15:25)

Continuity mistake: When Gambit is saying "How are we gonna beat this thing when we can't even get close to it?", Jean Grey is on the viewer's left of the group and Cyclops is on her left. When the shot changes, Jean and Cyclops have swapped places. (00:16:31)
Audio problem: Gambit's bō staff starts making a twirling sound a split second before he starts twirling it. (00:18:40)
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: Wolverine's 5 o'clock shadow disappears and reappears throughout the episode.

The Phoenix Saga (1): Sacrifice - S3-E3
Revealing mistake: During the opening battle in outer space, when the green ship uses its tail to tear a hole into the larger ship, you can see the tear slightly shift downward. (00:01:47)

The Phoenix Saga (1): Sacrifice - S3-E3
Continuity mistake: When Xavier is telling the X-Men about their mission to take control of the space shuttle, some shots show Cyclops and Jean Grey seated immediately to the left of Jubilee and Wolverine, and other shots show a gap between them. (00:03:24 - 00:04:37)

The Phoenix Saga (1): Sacrifice - S3-E3
Continuity mistake: When Gambit is walking past Xavier in the War Room, the collar of Xavier's shirt is suddenly much wider than previously shown. (00:03:39)

The Phoenix Saga (1): Sacrifice - S3-E3
Continuity mistake: When Gambit announces his presence in the War Room, there is a rectangular panel on the wall to his left that is the same color as the rest of the wall. When the shot changes, the panel is now a darker gray. (00:03:41)

The Phoenix Saga (1): Sacrifice - S3-E3
Continuity mistake: When Xavier is talking with Cyclops in his bedroom and turns toward the window, the back of his hover chair is pointed towards the open area immediately on Cyclops' right. When the shot changes, the back of the hoverchair is directly facing Cyclops. (00:05:09)

The Phoenix Saga (1): Sacrifice - S3-E3
Continuity mistake: When Cyclops asks Storm to give the team cover, so they can infiltrate the space center, she is standing directly behind him, close enough to have her hand on his shoulder. When the shot changes, she is standing all by her lonesome. (00:06:11)

The Phoenix Saga (1): Sacrifice - S3-E3
Continuity mistake: When Wolverine is breaking open the door to the space center, he leaves a long tear around the handle. When the shot changes, the tear has disappeared, and then returns in the next shot. (00:07:05)

The Phoenix Saga (1): Sacrifice - S3-E3
Continuity mistake: When the X-Men barge into the locker room, as Gambit is running towards the camera, you can see his gloves are entirely fingerless, whereas when the team first entered space center grounds, only his thumb, index finger and pinky were fingerless. (00:08:01)
The Phoenix Saga (1): Sacrifice - S3-E3
Continuity mistake: When Cyclops knocks out all the astronauts, they are in a large locker room area. Moments later when the astronauts are shown lying unconscious, the room is now a narrow corridor. (00:08:03)
Answer: It appears a number of factors led to its demise. It was originally intended to air for 65 episodes, but its popularity extended that. However, there were continual production quality problems, issues regarding whether the content was suitable enough for children, as well as financial considerations that finally led to it being ended.
raywest ★