So have completed a full battery usage and subsequent charging. Media server has not reappeared, so would consider solved.
I am not a super user - have a total of 30 apps in my app drawer - including GOS apps. I try to beta test new releases when I can and have gone back and forth with PixelOS (stock) more than a few times. All in, takes me about an hour to complete my set-up
Again, thanks for the help