Please tell us some basic information before asking for help:
Model Name: ASUS ROG PHONE 5s
Firmware Version: 31.0810.1226.128
Rooted or not: NO
Frequency of Occurrence: ALWAYS
APP Name & APP Version (If your issue relates to the app): Wifi & Hotspot
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.
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Tried Hard Reboot. Restarted several times. Gave Forget WiFi network. Unable to resolve issue.