Reconnecting the device could have caused a number of things <grin>
The device driver got reloaded (maybe it didn't get started correctly after going to sleep or something).
It could have triggered a driver update behind the scenes (if Windows is set up to do this)
The physical connection was also moved .. in case it became loose or got dust in it or some other phantom issue.

When stuff like this happens I (try) to remember it for the future and just move on. Solving it after the fact is not likely, but knowing this worked could be invaluable!

I do not work here, but the benefits are still awesome
Make your sound your own!