Whenever I enter into ground combat, the stupid secondary fire button, the one you can also find in the abilities menu, keeps disappearing from the interface. I have tried several combination, but it never actually sticks. What the heck is going on?

ive got the same problem ....

I have the same problem with both primary and secondary fire, does anyone know what causes this, or if they're working on a way to lock the toolbar so what we want to be in there stays there?

i have same problem with secondary fire, its starting to realy bug me now

I have the same problem. I had it during Open Beta also.