Mobile Trigger not working on iphone, fine on android phone.

Hi im getting desperate fighting with this.. maybe this has happened to someone recently and could shed a little light ?
The primary menu works on windows computer firefox and opera & android phone on opera & firefox with the mobile trigger, but on iphone safari or firefox tested, when you press the mobile trigger menu it doesnt open, it just changes the color of the 3 lines...

Ahh stupid iphones...

I called a friend with an iphone to try it and it worked for him so... WTF ? I updated the iphone ios system versions thinking it wouldnt do anything... but, now it works!