Talk about getting something wrong.

"It implies that imperial leadership knew that they were being led by a pair of Sith Lords well before it was revealed to the galaxy en masse around the time of the Battle of Endor and the destruction of the second Death Star."

Listen carefully to the clip, at no point does Tagge refer to two Sith Lords, only one.

https://www.slashgear.com/new-star-wars-anh-extended-scene-ties-in-sith-and-rogue-one-14482123/

And, all those dumbasses can laugh all they want at David Prowse for his voice, but only he's every really looked right in the suit.

Sure it looked okay in Rogue One (and was good to see Vader out there), but it wasn't quite the same.