api sometimes returns too much / hallucinated audio | Fish Audio | Page 1

I made a request like this:

 const response = await fetch("https://api.fish.audio/v1/tts", {
      method: "POST",
      headers: {
        "Authorization": `Bearer ${process.env.FISH_API_KEY}`,
        "Content-Type": "application/json",
        "model": "s1",
      },
      body: JSON.stringify({
        text: "かえす",
        format: "wav",
        reference_id: voice,
      }),
    });

I expected to hear かえす (ka-e-su) once.
Actual result is a 47s long audio that repeats the word (attached the wav for it).

The bug only happens for maybe 5% of generations. The voice id is "63bc41e652214372b15d9416a30a60b4".

Is this a known issue? Any known ways I can ensure quality or avoid this issue?

#api sometimes returns too much / hallucinated audio