Friends List friend "Offline" glitch

Since the 6.9 patch update, occasionally I would get visual glitches on my friends list. At first, it would be two friends overlapping each other. Then, I minimized the group they were in and expanded it again, and the overlapped ones came back as offline. I also tried editing my settings, flipping show offline friends on and off. After I stopped showing them again, they went back to hiding. What I think the problem is: A friend is online. Goes offline while you're looking at friends list. Appear next to your online friends instead of hiding.