Pet bar issue

[Mcaffee]

Hi I have a small issue with the pet bar and more importantly the part where you put your pet on passive mode, this bar is not accepting my clicks and therefore I am unable to switch between defensive and passive.
Now when questing tbh I don't give a you know what but last night during 10 man naxx at Kel the little git decided to pull all the fatties and I was clicking like mad but no go an dwe wiped. As a result my guild ranks has been reset to Uber huntard and my nick in vent is now nOOb.
I was able to to get the functionality back but only after I did /nui rl.
Also tested this on my DK and have same issue here but with ghoul and also the stance bar.
Could it be that the buttons are just a bit to small or is it something else?
Would be nice if you could help me out on this.