Noticed today that when playing Pokemon Go, if I have music playing, the volume (sound) falls considerably, and then rises again when quitting the app. Anyone else notice this? Is it happening on other games too? It's super annoying.
Its a bug with current version of Pokemon Go app, and already being fixed.
You can check TheSilphRoad reddit for threads on the topic.
You can temporarily fix it by triggering any kind of sound while within the Pokemon Go app ( receiving a notification, opening Siri, etc ).