Please tell us some basic information before asking for help:
Model Name: Zenfone 9
Firmware Version: 32.2040.2040.23
Rooted or not: not
Frequency of Occurrence: time to time, usually when the phone lies unused for a while
APP Name & APP Version (If your issue relates to the app):
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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I have noticed that app notifications popping up on the Standby screen are sometimes very dark. The notification cannot be read without approaching the phone or lifting it off the desk. It appears as if the screen does not fully brighten.
The problem is not consistent and I'm not sure what it depends on. It occurs in both bright and darkened rooms.