Just a heads up, it won’t fix the bricked units. They need to warranty those. Any new devices shouldn’t be powered on until the app update or else those will get bricked as well.
In order to update firmware on a device, the old firmware gets removed and then the app pushes the new firmware onto the device. The app currently isn’t able to push the new firmwares to the devices, so there is no firmware at all on the devices and can’t be installed by the user.