Samsung galaxy a71, twitch app image cropped?

I have a new cell phone and so far everything has shown perfectly on twitch. Now the picture can be seen over the entire screen and it is cut off on all sides. How can I change that again?

Take a screenshot:-)

Strange… I had restarted the mobile phone, reinstalled twitch and even reset to factory settings… Suddenly it works again after I have pressed the comment and I'm back in the app so sorry and thank you somehow

Funny… Now I can no longer switch to mobile data xD

Huh?