Aspect of the Turtle bug

Anyone else has this problem? For some reason my aspect of turtle cancels itself 4/10 in arena or bgs. I know its cancelled because im alive for few seconds after ( without it) to live and see it, till i eventually die off a bit later.

Can it be due to macros use? ( which i dont think so ) . I have it macroed like this :
#showtooltip Aspect of the Turtle
/cast Aspect of the Turtle
/cast Exhilaration

Except if im totally moron and there is a player ability that cancels it, which again i dont think so, so in the end its a bug after all. I hope devs see it and fix it