HEYGEN AVATAR Dropping by itself and need guidance on efficient interview experience.

Hello Team,

I am working on top of this deom repo https://github.com/HeyGen-Official/InteractiveAvatarNextJSDemo, customizing to when my config file looks

const DEFAULT_CONFIG: StartAvatarRequest = {
quality: AvatarQuality.High,
avatarName: AVATARS[0].avatar_id,
knowledgeId: "akaknoeldegeid",
voice: {
rate: 1.0,
emotion: VoiceEmotion.FRIENDLY,
model: ElevenLabsModel.eleven_multilingual_v2,
},
language: "en",
voiceChatTransport: VoiceChatTransport.WEBSOCKET,
sttSettings: { provider: STTProvider.DEEPGRAM },
};

need some suggestion why its unstable and can you provide me a guidance of knowledge bases on effective interview process using heygen.