Sith raid damage bug!

https://forums.galaxy-of-heroes.starwars.ea.com/discussion/167687/content-update-4-25-2018

Ongoing Investigation of STR P4 Damage Overages
We are aware that some players are experiencing instances in Phase 4, when Darth Sion and Darth Nihilus are defeated and Darth Traya is alone, where guild members with underpowered teams are registering very large damage totals to Darth Traya. In some cases that damage is being applied to someone else in your guild.
We attempted a potential fix last week, but it seems the problem is persisting. We have some additional fixes we will be attempting later this week and next to hopefully correct the problem. More than anything, we want you to know we are aware of the issue and trying to find a solution. It has turned out to be a particularly slippery bug. Many thanks to those in the community who have helped us to debug it by providing logs, screenshots, information, and live feedback.