This was happening on my Galaxy Note 9 and now on my Galaxy Note 10. I have been folowing this thread for some time now and attempted all suggested fixes. I primarily use Pandora with Andriod Auto and anywhere from minutes to hours later it starts blasting music. The funny thing is, the app isn't even open on my phone when I do this. I look for Pandora on the notifications screen and then on the recent apps screen. I have to actually tap on the Pandora icon and then the app starts like it's not already open and then once it starts I can pause it and shut it down. Both the app and the OS are up to date. This has happened across 2 different phones and all of the most current OS updates and app updates. I would really think you guys would have had a handle on this by now. Amazon Music is starting to look pretty enticing.
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