Default Adjust volume on videos in chrome

Ive been searching alot but only find a thread of htc phone with similar issue.

Whenever I watch movies in chrome and try to adjust volume with the hardware volume buttons, nothing happens. Its like they are totally ignored.
If I launch the youtube app or bsplayer etc then the hardware volume buttons work without problem. Tried same thing on a nexus 4 in chrome and there it works so there is obs some issue with sonys fw or w/e issue it is.

Is it only me or do others have this problem too?