I use ElvUi and clique, 90% of the time everything works fine. However when people are moved in to group 6 they disappear from my raid frames. They reappear when they are moved back.
I've checked the raid-25 and raid-40 visibility settings and also made sure whichever one is visible isn't limited to 5 groups. Also I don't seem to have any issues when I do Alterac Valley.