I had a problem with my bluetooth shutting down as soon as I turned it on. I don't know exactly what the problem was, but I use a program on my computer called CCleaner, it has a picture of a broom as the icon. I noticed they also make it for android. I downloaded it and ran it. Poof, my bluetooth is now staying on. I know it cleans a lot of old internet files, empty folders, etc. You can check the boxes of what you want to clean. I didn't check any extra boxes, I just cleaned with stock settings. I don't know exactly what it got rid of, but I'm glad to have my bluetooth solid again.
https://forums.androidcentral.com/e...id=com.piriform.ccleaner&hl=en&token=i9Pr6WWt
https://forums.androidcentral.com/e...id=com.piriform.ccleaner&hl=en&token=i9Pr6WWt