Not sure if it's just my phone, but after the most recent update received on my phone, my bluetooth audio has been very inconsistent. I find that when I listen to music, the audio gets quiet in some parts of the songs I listen to, especially when there are alot of instruments playing at the same time, or if higher frequencies are present. How do I fix this? I have cleared the cache of my device, uninstalled my music apps that I use, etc. I primarily use Google music, but it occurs on other apps such as the Sony music app. The problem does not lie with the headphones, as I have tried several other bluetooth pairs and have had no problems on my tab s4.