Well, seems Sony TVs have lots of issue related with Apps. Mine had tones of problems with YouTube. Didn't know that we could actually try to return it then. Was thinking of get a new one and kids cracked the screen. So we got a Samsung. In general we are happy with it but there is one thing drove me nuts: there is no dedicated button to switch video sources.

As long as it can show images and play sound correctly, those are really non-issues as I'm using Android TV boxes anyway. So disconnect the TV from internet and use a TV box instead, all issue resolved.