Moving to the second sentence: "The popular German sci-fi thriller series, Dark, has been making waves on Netflix since its release in 2017." Key terms: "popular", "German", "sci-fi", "thriller", "series", "netflix" (brand name), "making waves", "release".
First sentence: "The cause of the problem was unclear, but it was speculated that it might be related to a technical glitch or a mistake during the dubbing process." English Audio Track For Dark Season 2 Fixed
"Fans" could be "viewers|audience|fans". Moving to the second sentence: "The popular German
Moving on to the next part: "What Caused the Issue?" The words here are "Caused", "Issue". Synonyms for "Caused" could be "Triggered", "Produced", "Generated". "Issue" could be "Problem", "Issue", "Glitch". "netflix" (brand name)