Hi DTS, I suggest you please reboot your device in safe mode and check if you are experiencing the issue.
If you are not experiencing any issues in safe mode, then the issue could be due to any third-party application you installed recently.
To do this, you need to completely power off the device.
Then, power on the device, and when the Samsung logo appears, press and hold down the Volume Down key.
If done correctly, "Safe Mode" will display on the bottom left corner of the screen.
Also, check the bed time mode as well.