@shaneyshane @iwua
I'm on a Razer Deathadder Elite and the problem exists for me as well. I've only recently switched back to Opera so there may be settings I'm unaware of but googling has been anything but helpful.
I've found that if I place the cursor in the address field then forward click MAY work - i.e. sometimes the first time, sometimes the third time - also on the Speed Dial page. But it's not a satisfactory solution as it is easier simply to click on the browser 'Forward' button.