I've been researching for over a month to fix these issues on my M8 that is on Verizon. It's a stock phone, never rooted. Apps open and then close, some flash open but never do, apps constantly restart in the background. I don't have a lot of apps installed. Things I've tried... 1. Uninstalling apps and reinstalling them. 2. Factory reset on 5/1, didn't fix anything, but I seem to have only one or two apps that restart in the background. 3. Uninstalling the update for "Android System WebView" (found this one posted by people on the web that it can cause issues). 4. A day ago I read that going into the boot up and wiping the cache can fix the problem, but this didn't work either. So I'm planning on going to Verizon and asking for any fix they can provide since it's been a frustrating month and not sure I want to wait it out to see if the next update to Lollipop fixes the problems. Has anyone else had any luck with going back to their provider and coming out with a solution?