I submitted diagnostics from the appletv app a few minutes ago.
I had been trying to get two matches in the Euro football championships playing simultaneously. When entering picture in picture, I could get one match to show. Then when trying to activate the second match, the audio changed to the 2nd one, but no image appeared.
Is it supposed to be possible to have 2 live streams at the same time or is it only meant to work with recorded content?