Please tell us some basic information before asking for help:
Model Name: Zenfone Live L2 (ZA550KL)
Firmware Version: WW_Phone-15.07.2003.51
Rooted or not: Not
Frequency of Occurrence: Always
APP Name & APP Version (If your issue relates to the app): -
this is an indicator light bug. When I charge my Zenfone in the ON state, the indicator light turns green when it's full. But this does not happen when the Zenfone is OFF, the light stays red even though it is full. I only realized this after a security patch update.