Please tell us some basic information before asking for help:
Model Name: asus 6z /ZS630KL
Rooted or not: not rooted
Frequency of Occurrence:
APP Name & APP Version (If your issue relates to the app): camera apk
In addition to information above, please also provide as much details as you can, e.g., using scenario, what troubleshooting you've already done, screenshot, etc.