PATCH /guilds/{guild_id}/members/{user_id} — channel_id move disconnects user instead of moving them

The Gateway fires two VOICE_STATE_UPDATE events in rapid succession: The channel=null event arrives before the move is applied, causing the Fluxer client to visually disconnect the user from voice. In practice the user ends up fully disconnected rather than in the target channel.

Environment (optional)

• Fluxer instance: fluxer.app (official)
• Bot runtime: Bun v1.2.23
• OS: Linux (Docker container, Alpine)
• Bot permissions: MOVE_MEMBERS, CONNECT, MANAGE_CHANNELS

Logs or screenshots (optional)

[2026-02-23T14:35:38.233Z] INFO Starting Fluxer Vox bot... [2026-02-23T14:35:38.237Z] INFO SQLite database ready at /app/data/vox.db [2026-02-23T14:35:38.237Z] INFO Loaded 12 command(s) [2026-02-23T14:35:38.238Z] INFO Connecting to Gateway: wss://gateway.fluxer.app [2026-02-23T14:35:38.472Z] INFO Gateway READY – bot user ID: <BOT_ID> [2026-02-23T14:35:38.473Z] INFO Logged in as Vox (<BOT_ID>) [2026-02-23T14:35:38.474Z] INFO Gateway connected (user ID: <BOT_ID>) [2026-02-23T14:35:38.478Z] INFO Startup cleanup: deleting stale temp VC <CHANNEL_ID_1> [2026-02-23T14:35:39.236Z] INFO Startup cleanup: deleting stale temp VC <CHANNEL_ID_2> [2026-02-23T14:35:39.500Z] INFO Startup cleanup: deleting stale temp VC <CHANNEL_ID_3> [2026-02-23T14:36:03.229Z] INFO VOICE_STATE_UPDATE: user=<USER_ID> channel=<GENERATOR_CHANNEL_ID> [2026-02-23T14:36:03.554Z] INFO Spawned temp VC <TEMP_VC_1> for <USER_ID> in <GUILD_ID> [2026-02-23T14:36:03.658Z] INFO VOICE_STATE_UPDATE: user=<USER_ID> channel=null [2026-02-23T14:36:03.670Z] INFO Moved <USER_ID> to temp VC <TEMP_VC_1> [2026-02-23T14:36:26.083Z] INFO VOICE_STATE_UPDATE: user=<USER_ID> channel=<GENERATOR_CHANNEL_ID> [2026-02-23T14:36:26.434Z] INFO Spawned temp VC <TEMP_VC_2> for <USER_ID> in <GUILD_ID> [2026-02-23T14:36:26.528Z] INFO VOICE_STATE_UPDATE: user=<USER_ID> channel=null [2026-02-23T14:36:26.536Z] INFO Moved <USER_ID> to temp VC <TEMP_VC_2> [2026-02-23T14:36:41.623Z] INFO VOICE_STATE_UPDATE: user=<USER_ID> channel=<GENERATOR_CHANNEL_ID> [2026-02-23T14:36:41.837Z] INFO Spawned temp VC <TEMP_VC_3> for <USER_ID> in <GUILD_ID> [2026-02-23T14:36:41.931Z] INFO VOICE_STATE_UPDATE: user=<USER_ID> channel=null [2026-02-23T14:36:41.943Z] INFO Moved <USER_ID> to temp VC <TEMP_VC_3> Expected behaviour The user is seamlessly moved from their current voice channel to the target voice channel, consistent with Discord's behavior for the same API call. The Gateway should fire a single VOICE_STATE_UPDATE event reflecting the new channel_id. ---

Summary

When a bot uses PATCH /guilds/{guild_id}/members/{user_id} with a channel_id payload to move a member between voice channels, Fluxer fires a VOICE_STATE_UPDATE Gateway event with channel_id: null (disconnect) before the move completes. This causes the client to disconnect the user from voice entirely rather than transitioning them to the target channel.

Steps to reproduce

1. Have a bot with MOVE_MEMBERS, MANAGE_CHANNELS, and CONNECT permissions
2. User joins a voice channel
3. Bot calls PATCH /guilds/{guild_id}/members/{user_id} with body { "channel_id": "<target_channel_id>" }
4. Observe Gateway events and client behavior