Post the update to Android 8.0 Oreo, the volume levels keeps randomly changing. It either decreases or increases on its own. Very annoying as this persists all the time while listening to music on the phone. This wasn't the case before the system upgrade. Please provide a solution, as it is very annoying to listen music on headphones.
Same issue here. When playing an album each track will start at a high volume then within seconds it goes quieter with a noticeable drop at around the 30 second mark. Then seems to randomly go slightly louder and quieter but never anywhere near the original volume. Next track starts at high volume and the cycle repeats. This is using the phonograph music player app.
Secondly phonograph will shut down after around 30 minutes if the phone isn't touched. This also happens if listening to podcasts through the chrome browser to the problem isn't isolated to phonograph.