Instead of playing the cut scene where you found out that the cat is evil and faked it's death it instead just show the cut scene where the cat died on the roof .

The things that i think could have caused the bug are:

1. I load a save file form after i won the game and just left the island .
2. I collected 2 parts of the robot suit and defeated the Robo Don and the 2 guys in power suits WITHOUT any time (in game) passing.