I had the same problem, and this is how i revolved it: I had deleted retroarch and and reset CFW with reboot to payload. Maybe, i can do this without to delete retroarch .. but, this issue appeared since retroarch installation, or it's a coincidence (Sorry for my english, it's so middle, but i hope you'll understand it. (NB : I thinkin that is problaby an ram managin's issue.. and reset Switch, go to "wash it".