Hello, thanks for reaching out to us. I will try my best to help. There a few things we can do to help with this. First, let's make sure the device is up to date by checking the software. Secondly, you can test the device in safe mode to see if possibly any third-party apps are causing this to happen. To activate Safe Mode, please power your device down, then power it back on, pressing and holding the Volume Down key when you see the Samsung logo. You’ll know it’s active because the words “Safe Mode” will appear in the bottom left-hand corner. If the device is running fine, I would suggest uninstalling recently downloaded apps one-by-one and test the device. I hope this helps. Thanks for reaching out to us. ^Lin