You can still scroll with the direction buttons on the remote. However in mobile view the browser should react to the OK click as it would be a "tap", therefore, with up and down swinging it should have result in scrolling. But if it selects the test instead it indicates that it recognizes the OK button rather as a mouse click. Which is not OK, as the Andorid version of the browsers shouldn't bother with mouse clicking by default.
Maybe HiMedia changed/missed something in the recent firmwares regarding the input devices driver configurations.