Apple device was restored from an iTunes backup copy.
Delete the Miele app from your smart device.
Reinstall the Miele app on your smart device.
The push notifications are missing on Apple devices. When an Apple device is restored using a backup copy from iTunes or saved settings are transferred to a new device, the device might stop receiving push notifications from the Miele app.
Delete the Miele app from your smart device.
Reinstall the Miele app on your smart device.