It usually happens when I'm running Dolphin Browser and maybe have tapatalk running in the background. I've noticed when I stop watching a video, I'll try to open the task switcher and it will be frozen. I'm pretty OCD about not having too many apps running in the switcher so I can't imagine that a flagship phone can't handle what I'm throwing at it when I'm very anal about what programs I have open.
I have checked app manager right after it happens and don't notice anything that looks too out of the ordinary. Any suggestions on what I should be looking for? I haven't had this issue today so far. It happened twice yesterday and once I pulled the battery because it was frozen so badly. This just seems ridiculous that this is happening on this device, which is supposed to be a top of the line smartphone.