Javascript evaluation not working in developer tools

[xamolxix]

Hello,

I'm using chrome developer tools as per http://doc.qt.io/qt-5/qtwebengine-debugging.html. I have set --remote-debugging-port=1024 and I can access the tools on localhost:1024.
That seems to work except I cannot evaluate javascript in the console. console.log() and inspecting looks okay, but when I type something in the console nothing happens except the cursor moves to the next line.

I would appreciate any tips. I am using qt 5.7.1 on windows 10.

[xamolxix]

I've tried it inside a linux VM and it's the same.