Chosen Solution
I dropped my Samsung galaxy tab a 6 and then a line appeared diagonally on the screen and it started to glitch out. Clicking stuff i didn’t want to touch.
@mannythebosss “then a line appeared diagonally on the screen” and " Clicking stuff i didn’t want to touch." indicates a broken digitizer. Replacing it should resolve your issues. Use this guide for that.
My sis tablet keeps saying Samsung disclaimer then going to background Update (03/16/2018) Try to let the device die don’t charge till couple hours or days then check