We've had a few cases with this issue and after much debugging finally found the cause! It is actually a “bug” from canon, but here's the fix: You probably set your camera up to upload photos via FTP at some point in the past. Interestingly, even if you’ve disabled wifi, but are connected via USB (...

Hi,
i should have mentioned that i already did a factory reset.
I checked the FTP Settings nothing configured, WiFI on or off no change.
The Wireless Menu keeps flickerin as long as the Unleashed is pluged in.

In the app, the device is shown as "0xFF".

Hi,
have you found any solution for your problem?
I have the same problem -- 5D MK IV (Fw:1.4.0) - Unleashed 22 (Fw:3.5.1) - iPhone with App Version 3.2.0

@foolography is there a solution for this problem?