New
#11
I think this bug is a result of a bug that was fix with the volume resetting to 100%
We fixed an issue that resulted in the volume mixer slider for system sounds getting reset to 100% after receiving a notification or altering master volume
Read more at Announcing Windows 10 Insider Preview Build 14352 | Windows Experience Blog
My machine is mostly silent because I prefer it that way, but since I've had problems with Skype for Business, I'm going to get out one of the five or six music CDs I have and do a little more testing on this issue.
Oh, and don't worry if others say they don't have the issue . . . it happens all the time that some issues are selective, in that they only choose a few of us. I think it's just to make us look silly. :)