I have noticed that the subtitles does not seem to work properly when watching on my computer. I have compared with my apple TV and the app looks to be working as expected.
Steps to replicate:
1. Install now TV app on windows computer (OS: windows 10)
2. Play a movie content
3. turn on the sub title
4. observe the player
1. Notice that there are times that the words does not disappear on the screen for few minutes
2. There are times that subtitles are not shown