Ideas
These screenshots may not seem like that large of a deal, but they actually have a quite dramatic affect on the flow of this battle in specific. For this battle (Emperor Palpatine lead Starkiller) the goal is to maximize damage against everyone except barriss while doing little to no damage to her. Normally someone using the Jedi Vanguard reduced damage level 6 should make accomplishing this goal easier as it should only be affecting the damage that Barriss takes. However, especially when combined with the effects of Lifeblood (From Rey) and high defense rolls on the datacron itself this can make it incredibly challenging to get Ben Solo (A normally quite soft target) low on health fast enough. I can't say this bug has singlehandedly cost me a win in GAC yet, but I have definitely seen myself and others drop battles we wouldn't have had this bug not been present.