Please don't report that a known audio issue hasn't been fixed. George (n6zs) already explained that the course editors can't change the pronunciation of any sentence. He has already done everything he can, which is to stop this sentence coming up as "type what you hear".
Only the programmers can do anything more. They could replace the text-to-speech software with a different one, but they would most likely just replace one set of issues with another. There are thousands of sentences in the Duolingo database, and they simply can't verify each one.