Weird one: Oregon 700 not behaving like any orher Garmin

Hi,

I have a mature set of DataField apps that run on anything Garmin makes from CIQ 2 on. 

It uses two different displays based on activity state - when activity is active it shows current data, when paused or stopped it displays target summary screens. It has been out for years and works without issue. 

Except on Oregon where I’ve received a bug report (and a video) of the field not responding to activity state at all. 

Is there anything different in any way with Oregon series and activity state value / activity tracking that might explain this? Or at least give me a toehold to start debugging?

Bemused of Dublin