Navigation lost when pressing back button

Hi,

When I launch navigation, if I come back to to the watch screen (using back button), it seems that navigation is cancelled and I have not any warning telling me that coming back will end my navigation.

On my Suunto, coming back to time screen was not ending the navigation and navigation was continuing in background until I ended it.

I didn't find options to let navigation continuing in background. Do you know if there is an option to don't have navigation ending accidentally or at least to warn the user before ending it ?

Thanks