Running latest software all around, this has also done it occasionally on my Samsung S10 but its been doing it almost non stop on my fire stick for a month or two now.
Basically, the show i’m watching will end, screen will go black and the last say 10 minutes or so of the audio will play again over the black screen.
Doesn’t seem to be picky on what shows it does this on either.
Really weird, only been doing it for a while so I know its not a trouble with the files at least.
Any suggestions welcome 
