I have the exact same problem aswell.
This is happening with Google Australia - google.com.au
All the other Google's work fine.
Firefox and Edge are fine with Google Australia.
I had a look at the old Opera browsers and found that up to Opera 25.0.1387.64 works fine and then 27.0.1689.54 stops working and has the issues with Google Australia.
Opera beta 35 has the issues with Google Australia aswell.
somewhere between 25.0.1387.64 and 27.0.1689.54 is where it stops working with Google Australia.
Google Australia has recently stopped working, was working fine with Opera till about November December 2015.