Per-user volume set to 0% is ignored after rejoining voice

Summary

I have previously turned a bot's user audio to 0%, then left. When i joined back, the audio was visually at 0% in the slider, but the audio was going through as if it was at 100%. changing the slider again actually applied the value.

Steps to reproduce

1. Turn down the user volume
2. Exit, restart app, do whatever (unclear)
3. Join back in a voice channel with the same user

(In this case it was a bot)

Environment (optional)

stable build 263 (0f5c277), 2026-04-07 16:10:45 UTC, Electron 39.2.7, Windows 11 10.0.26200 (x64), desktop stable 0.0.8