While raiding I came across a bug, which forced me to target a specific ally with buffs/heals. I don't have "Snap Ground Target to Current Target" or "Ally Targeting Mode" activated and it didn't matter what I was targeting it was always the same ally. After using gg to die it was fixed. It happened twice, one time on Druid so I couldn't properly use abilitys like staff 3 or avatar 1,2,3 and the other time on Berserker where it affected my banners.