Discord voice receive decrypt failure: DecryptionFailed(UnencryptedWhenPassthroughDisabled) causes STT to miss user speech

Environment

• OpenClaw: 2026.2.23
• OS: macOS (Apple Silicon)
• Node: 25.6.1
• @discordjs/voice: 0.19.0
• @snazzah/davey: 0.1.9

What happens

Bot joins Discord voice channel and can speak, but often fails to hear/transcribe inbound mic audio from users. It then responds with generic fallback prompts as if no valid transcript was received.

Gateway logs show:
discord voice: receive error: Failed to decrypt: DecryptionFailed(UnencryptedWhenPassthroughDisabled)

Expected

Inbound voice frames decrypt successfully and STT receives user audio reliably.

Actual

Inbound decode intermittently/consistently fails with decrypt error; STT input is effectively lost.

Repro steps

1. Configure Discord voice in channels.discord.voice with autoJoin.
2. Restart gateway.
3. Join VC, run /vc join.
4. Speak two short phrases with clear pauses.
5. Observe log error above and missing/incorrect transcription behavior.

Config notes

• channels.discord.voice.tts set for ElevenLabs.
• messages.tts also set for message surfaces.
• ElevenLabs auth was separately validated and fixed; decrypt error persists on inbound VC path.

Sanitized log excerpt

warn discord/voice {"subsystem":"discord/voice"} discord voice: receive error: Failed to decrypt: DecryptionFailed(UnencryptedWhenPassthroughDisabled)

Impact

Real-time voice-chat use is unreliable because user speech is not consistently captured.

Request

Guidance/fix for Discord inbound voice decrypt handling under current DAVE/E2EE behavior (or recommended config/runtime workaround).