OK i figured it out. If you are watching Netflix on your Apple TV, during the episode or whatever you're watching...press the ENTER key once to pause the tv. The Circle in between up, down, left, right. Then HOLD DOWN the center button for one second and a subtitles box will appear. You'll see Subtitles, Audio, Speakers. Select by pressing UP and RIGHT to the AUDIO section. There, it should say English and English - Audio Description. If Audio Description is selected, simply toggle to Audio>English...Press Enter. Problem is solved. No idea why this started happening all of a sudden but this will correct it.
Select show>Pause show with circle/enter/pause/select button> Hold down the same button for One second while show is paused>New Window appears>Toggle to Audio>Select English (it will be set to English Audio Description) if you're having this issue>Press enter button again on English (no audio description) and you'll be set.
On your Mac, simply select the boxes in the bottom right of your playing episode. it will look like the CC box you'd normally see. Turn it to English. Not English audio description.
hope this helps! it worked for me right away.