if pasok pa sa warranty better ipaayos mo na yan sa legit customer repair store ng samsung...or try to browse on fb or google to check if yung issue is hardware or software issue..for sure merong user din ng unit mo also experiencing this kind of problem...and if ever software issue...try to report sa devs for sure meron yang report app kung pwede ka mgsend ng screenshot and other files as evidence sa nagiging issue ng phone mo now..m