App Logo Above Watch Face on Apple Watch

I am running two different background modes(not at the same time), 1 with a workout and 1 with a location. I noticed that the app logo appears above the watch face for both background modes but does not show up consistently. I wonder what the significance of the logo showing up above watch face is? Additionally why does it show up sometimes but not others?

Thanks

App Logo Above Watch Face on Apple Watch
 
 
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