I'm sorry but I'm literally lol'ing at the "zoom your camera out more" replies.

That said, yeah...this is at it's worst when it happens with a skill with a tremendous cooldown. I never lag, really, never had latency issues, but this does happen to me. I'll click Perfect Balance, go to Snap Punch...it's still grey. I just blew my Perfect Balance on nothing. I just shrug and Dragon Kick, but it's annoying as hell. This is pretty rare of an occurrence though for me personally, maybe twice with PB, and about 4 or 5 times with IR/BFB since I've started in September.