I have tried deleting the app, restarting tv and installling again. It DIDNT work.
I also tried to reset the LG TV to initial settings and reinstalled the app. Stil it DIDNT work.
After consulting with hotstar, i received the following response.
Sincere apologies for the inconvenience.
This is a known issue with few models of LG TVs and we have already highlighted the issue to the LG Team.
We wish to inform you that we are working on a new video player which will be launched soon. Please note that the new player will resolve this issue. However, it will take up to 3-5 weeks. Appreciate your patience.
In the meantime, we request you to try accessing on our platform via a Laptop/Desktop Web browser or Hotstar mobile app.
I am also having the same issue. Just noticed this last night watching Avengers and was pretty upset. Must be an app limitation and hopefully will be addressed with an update later as there is no setting anywhere that changes this. As you stated Netflix works fine with 5.1 so this is an app specific issue. 😕
Welcome to the club! Seems a lot of us are having this issue (86UH9500 2016 model), see the other Disney+ thread if you want to keep track. I would also suggest contact Disney+ on their support page and let them know the issues you are having.