Poweramp build number - 859
your device model - OnePlus 6T
your Android version - Android 10.3.0
Car model - Toyota Corolla 2019
So I've noticed something really strange, if I start driving for example from home to point B the music works normally, but when I start driving back home, this is when the problem starts :
I connect to the car BT as always and after about 2-5 minutes, the music suddenly starts to sound choppy for 5 seconds and then it stops and resumes only when I turn on my phone's screen (without unlocking) and from here it will start doing the same choppy to no music routine but immediately after I turn off my screen, without that 2-5 minutes delay. when the screen is left on, the music will play normally.
I don't really know where the issue lies, since I bought the car (which has Android firmware as well) at the same time I got the Android Q update, but when I tried playing music from iTube which works with downloaded files, the music worked fine.