I just hit the X to shut it down, then I'm good to go for 3 to 4 months before I see it pop back up if not longer...
Same way with my old HTC One M9 phone.... I just recently got this HTC U11 model, and my opinion it kicks the iPhone 7 plus and the Samsung 8's arse all over the place...since I have both of those on my plan to..to compare them....
TC