I am using a Galaxy A6. My phone's screen randomly goes black and after a short time it goes to the lock screen. I just need to navigate back to the app, but even when I enter the password it goes back to the lock screen. I tried Safe mode and nothing seemed to happen so far, but when I go back to Normal mode the problem comes back. it's sometimes when I turn the phone to vertical position or I tap the phone, or when I shake it lightly. Sometimes it just goes off randomly. Sometimes it doesn't go off. What's happening? Are there multiple problems at once? Scanned and no virus or malware. Will try to test in Safe mode again.