My guess. Its probably an issue with airdodging when you have a lot of aerial momentum. The shine sends him up and then the laser resets the fox into a regular falling state so he can airdodge immediately afterwards. He still has momentum from the shine and because its a cpu he does a ******** frame perfect airdodge up (away from the falco) and shoots up into the blast zone and then because he recently took damage? (or whatever the specific criteria to allow you to die once you enter a blast zone, since I know its not just passing through it otherwise luigi elevator and link super jump would be quite fatal), he dies.
