When having Minecraft open, then pausing the game and changing the default sound output device does not change the Minecraft sound to the new default sound output. This did work in versions using the old launcher.
When having Minecraft open, then pausing the game and changing the default sound output device does not change the Minecraft sound to the new default sound output. This did work in versions using the old launcher.
LWJGL issue, caused by the new launcher's policy of forced LWJGL updates.