I have three issues with Infuse on my Apple TV:
My Movie has embedded subtitles. It works fine, but the last subtitle sentence has no correct ending. It’s visible till the ending from the movie. This happens to all my other movies as well.
In tvshow view, the word ‚episode‘ is too far above and get cut off.
The Upscaling from HD Footage to 4K is not really smoothly. It has some artifacts/jagged edges. In comparison iTunes Homesharing has a much better upscaling quality.