I have started using the regular Tablo App instead of Preview because the preview always restarts at the beginning no matter what the cause of the stop.
While I even like the picture quality better on the regular Tablo App, I can’t seem to get closed captioning turned on. I have a fires stick hd and when I press the options key, I see settings on the bottom right of the screen, but for the life of me, I cannot get it to open, it just starts play.
But it’s in a spare room and been in sleep mode for 6 months or more. I hate Amazon products and keep them as backup. I’m too lazy to go mess with it. And the actual tablo WEB page makes no distinction. Maybe if you search the the forum. Or wait for support