Hi, we'd request you follow the below steps:
1 . Ram management - there should always be adequate RAM available if the device needs to work flawlessly
2. Restart whenever you face this issue
3. Restart the device in safe mode – i. Power button hold for 2 seconds, ii. tap on the power off message which pops up on the screen, hold for few seconds it will give you an option to boot in safe mode.
4. Also, check if your device is on the latest software version if not already updated
5. If nothing work you can back up your phone & factory reset your device.
6 . Last option would be to visit the service center to have
a check. Locate here: https://www.asus.com/in/support/Service-Center/India