If it's really due to this abnormal method of ascension, then Fei's sudden disconnection from faith doesn't seem so incomprehensible..."
After all, the stolen strength was not truly granted and certainly wouldn't be as stable as a normal believer's.
Perhaps slight changes could render this stolen strength ineffective, leading to the loss of the faith connection.
Furthermore, a believer's ascension is not like that of a Transcendent who could rest easy after deceiving to gain power for ascension.
The gifts of a God constantly test the believer's qualifications, and any change in faith will reflect in the granted gifts.
Breaking certain principles might lead to the loss of favor, while adhering to some could bring more gifts.
Therefore, this deceit towards a God would likely need continuous maintenance.
If seen as dead, such deceit would no longer be sustained, so suddenly losing that disguise and having the gifts stripped away is completely normal.
