I'm having the same problem with the twitch app on my firestick. When you agree to "watch it again" it doesn't start the stream from the beginning it kicks you back to the video right at the end, which prompts you to either "go back to the profile" or "watch it again" and again once you click "watch it again" it sends you back to the very end of the video so you are stuck in an endless loop of being unable to scroll back to any point in the video and being asked if you want to "watch it again".
I'm having the same problem with the twitch app on my firestick. When you agree to "watch it again" it doesn't start the stream from the beginning it kicks you back to the video right at the end, which prompts you to either "go back to the profile" or "watch it again" and again once you click "watch it again" it sends you back to the very end of the video so you are stuck in an endless loop of being unable to scroll back to any point in the video and being asked if you want to "watch it again".