You may try some troubleshooting steps below at home
1. Please try to enter "Safe Mode" to test if the issue remain. If the function works well in "Safe Mode", please check on any disturbance from the installed 3rd party Apps.
# How to enter and exit "Safe Mode"https://www.asus.com/support/FAQ/1005163/
2. Check on your current firmware version
Setting >System>About Phone>Software information
If you try to update to the latest version, does the issue still remain?
If the issue remain, please provide me your firmware and more issue detail, a video will be better.