Didn't notice anybody talk about it : subtitles do not disappear. I mean, if the sentence of the character is done and there is no word for 5 minutes for example, the last text will be stuck on the screen.
Same thing when jumping from end of episode to next, the last sentence text is still on the screen till a new one is written…
Noticed it with Series, I dont know yet if same vor Movies or Live Channels.