Is anyone not having this problem? Sounds to me like a software issue.
Does the screen go totally dark when not using AOD?
Screen goes totally dark in other places and when using a third party AOD app. Only seems to affect built in AOD and Night clock modes.
Uninstalling the AOD updates does not fix it.
Clearing the AOD apps data does not fix it.
Clearing the devices cache does not fix it.
A full wipe reset does not fix it.
I would say that somehow software has corrupted part of the display hardware but only the part that controls AOD. Only solution I've found here and on other sites is exchanging the device for a replacement. I don't trust the UK repair centre not to screw it up so I'll probably just stick with the device and not use AOD.