I have a Nexus 5 phone with Android 6.0.1 and I'm trying to use it for time-lapse videos ("Lapse it" app) which means it needs to be on for many hours undisturbed.
The problem is that WhatsApp creates a dialog regularly which interrupts the time lapse photo app that I'm using.
I have disabled all notifications for WhatsApp, but this dialog comes up anyway.
Deleting WhatsApp would of course solve the problem, but it not possible for other reasons (message history etc stored). Registering the app would also stop the dialog, but is also not an option since I'm using the same number on another phone.
I think it should be possible to disable all dialogs, but since I've tried that and this dialog still comes up, what else is there? Is there a stronger blocking option? Can it be done if I root the phone?
Attaching screenshots of the notification and of the settings.