Prevent stuck partial wake lock

[brarcher]

Google playstore analytics indicates that usually when a partial wakelock is held it is done for less than a minute. However, a few times a user did something to cause the partial wake lock to be held for 4-8 hours. The reason for this needs to be determined.

Is the partial wake lock the lock used when displaying a barcode and brightening the screen? Is that causing the phone to not sleep?