Quirky little bug here on the Expedition.
For hiking I have the data screen background color set to white. For cycling I have it set to black.
During activities, I often notice the background color changing on its own. Here is an example from this hike:
Black background. Then .1 miles and not even a minute later it changes to white:
Same hike, other photos:
Again, reverted back to a black background. One minute and .1 miles later and it went white:
I notice this on other activities, specifically cycling, it's just harder to capture photo evidence. As far as I am aware, it's been going on for about 3 months.