Why does my iPhone show an endless WhatsApp sync notification that drains the battery?

Sometimes a message can't be decrypted right away — when that happens, Whapi keeps trying to decrypt it in the background. On iPhone this retry cycle can surface as a persistent WhatsApp sync push notification that never clears, drains the battery, and gets in the way of normal phone use.

There are two ways to handle it:

1. Wait it out. In most cases the message eventually decrypts successfully on one of the retries, and the notification clears on its own. No action needed if the battery drain is tolerable in the meantime.

2. Disable the retry loop. If the notification persists too long, turn off pdo_sync for the channel:

{ "pdo_sync": false }

Default value: true.

disabling pdo_sync means some old messages that would have eventually decrypted on a later retry will stay undelivered instead.