Hello,
I've noticed this on my stamSorc, magDK and stamDK. Haven't noticed it on other classes.
Frequently, when I cast my armor buff ability (Hurricane or Volatile Armor), the visual effect does not appear. I'm not sure if it's being overridden by another visual effect or what, but it makes it difficult to keep up my buffs in PvP because I don't have a visual que that it expired. So I often end up re-casting it to get the visual effect to appear, but of course this has a negative impact on resource sustain. I do have the Action Duration Reminder addon, but in the heat of combat the visual effect of the ability grabs my attention much more than a small number at the bottom of the screen.
K thanks!