My guild noticed that depending on who logged the raid, we got very different results. This seems to only have affected the twin emperors fight.
This is the same fight, recorded by two people on opposite ends of the room.
https://classic.warcraftlogs.com/reports/nRtM1gprXVAfcK3m#fight=last
https://classic.warcraftlogs.com/reports/72mfjzyvMbBx6dK4#fight=last