Xiaomi Mi TV 4s

Hello, I found a big bug on Xiaomi TV. I buyed a 55" Mi TV 4S and it's great. So I buyed another one for my parents. I dont watch Live TV so I didnt recognize that there is something wrong. My parents do watch Live TV, so after set up I wondered, why it isnt possible to switch tv channels with UP and DOWN button. You have to press CH LIST, choose your channel and press okay button.Thats very, very inconvinient!

So I downloaded the Google-made App "Live Channels". The Live Channels App...

Xiaomi Mi TV 4s