I found this description on an independent asus news site
https://www.thegoandroid.com/but on all ASUS official sites the latest Firmware is .188, incomprehensible !!!
For your problem, tried restarting in safe mode (all 3 buttons simultaneously)
[November 22, 2021]: Asus is rolling out a new update for the ROG Phone 5 on the firmware version JP_18.0840.2111.196. The package adds the November 2021 security patch and resolves a few issues. Below is the official changelog by the company.
Changelog
ο Google Security Patch Update (November 5, 2021)
ο Fixed the problem that the color of the setting screen was not displayed properly
ο Fixed an issue that could cause screen display issues when browsing certain web pages
ο Fixed an issue where the Lightning Armor Case would sometimes not work properly after connecting a gamepad
ο Fixed an issue where the device might shut down automatically in rare cases when using LINE calls