Netflix two languages at the same time?

I'm currently watching on an old AppelTV, the series Community and from a certain sequence, suddenly the German and the English language are played simultaneously. I don't have the problem on the PC. Does anyone know what that is and how I can get it away? In the language settings I have already tried enough that I can say, so it does not come.

Try switching from stereo to mono.

Mhm. I wanted to try the tip right now, then I started a sequence from the beginning and then it was gone. Funny. But thanks anyway

Search for "two-channel sound" in Help when it happens again. Doesn't have to be, but can.