I think it's the dragon roar sound. Maybe it's just a bug, but it stuck in the loop and just never finished. Great that you added settings menu, it helps me to overcome this issue
It might be the dragon breath which should fix itself when you breath for just a milisecond. If we mean the same it could be because of something at the start or something with switching tabs/go to the settingsmenu.
Otherwise you did encounter something I am unaware of.
