In the UK, running the app this afternoon, using the downloaded maps and in ‘flight’ mode, the main map’s direction is correct (ie turn left / take the first exit at the roundabout) but the icon in the left hand corner of the screen, thought I was driving on the Continent, in other words, that I should drive around the roundabout anti-clockwise.
https://www.myrouteapp.com/en/social/route/8467015?mode=share
Other than that, it behaved perfectly, right the way back to central London.
Have a great Christmas everyone and best wishes for the new year.