When submitting a bug report, please use the below template and thoroughly fill out the necessary information.
Date & Time:
Frequency:
World name:
Character name:
Retainer name:
NPC name: Gaius
Monster name:
Class/Level: Any Job / lvl 50
Party or solo: Praetorium Dungeon
In-game time:
Area and coordinates:
Housing:
Steps:
1. X out of client
2. Relog back into the game while the cut scene is playing.
3. Start fight while the cut scene is playing.
4. Rest of the players join the fight after the cut scene ends.
This has been possible since the Paetorium revamp although now that the Moogle event is going it's been happening nearly every run. The tank will close their client and relog in and start the final fight ahead of everyone else. I've seen DPS do this as well.
Note: I have not personally done this. I have witnessed the end result of the boss as much as 20% down on health past the first mechanics by the time the cut scene ends.
Thanks.