There is no point in waiting for feedback on Firwmare updates with Google's dictatorship policy, whatever you do your system will be up to date, the only thing possible is to turn off "Automatic system update" in the options developers, but this is misleading, the update will be done anyway, this option will just allow you to answer "later" or "restart now".
Clearly, the choices download, install no longer exist, the firwmare is automatically downloaded and installed on a hidden partition which will be active when the device is restarted.
Due to many memory corruption issues in software and even on low level qualcomm chip drivers, the only safe procedure still possible is as follows.
Automatic system update on deactivated (developers option)
Do not restart the phone when requesting notifications
Physically turn off the smartphone and turn it back on
Désolé pour les captures Francaise mais j'ai la flemme de repasser encore en anglais