Hello Karl,
Firstly to answer your PM:
The blank device background mode entry thread of mine does not apply here. It only refers to initial connection and you are obviously past that, even load the algo.
What I have noticed is that you are using the S8P file for a GB60. While it is true that, at least initially, these devices were just a GB60 and a radio jammed into one piece of plastic I don't know whether this still holds true.
P&E have available a specific S8P for your device MC13213.S8P so I would be using this one.
Sometimes these different files are just the same thing with different names for simplicity, I have not checked this out in this case.
Good Luck!