Unplugging headphones the last available audio device will cause Minecraft to stop playing sound, as expected. However, when plugging that audio device back in, Minecraft will not start to play sound again. A restart to Minecraft is required to cause sounds to begin to play again.

What I expected to happen was...:
When I start my audio device again (eg, turn on bluetooth headphones, plug back in my headphones, ect) I expect the sound to start playing again.

What actually happened was...:
No sound plays!

Steps to Reproduce:
1. Disconnect your audio device from your computer. This can either be done by turning them off (for example, if they are bluetooth), or unplugging them (if they are wired.)
2. Connect your audio device (turn on your bluetooth headphones, reconnect your wired headphones, ect)
3. Try to make sound in Minecraft, and realize that no sounds play.

Notes:
I have not tested this when other audio devices are available. I have only tested this when there is only one audio device available, and it gets disconnected in some way, and then reconnected.