Map / Navigation Query

Hi guys,

Query with maps on the F5x... I've updated the maps and turned on Topo Europe South West to cover the UK and turned off base map...

I've put a course (gpx exported from os maps) on the watch...

when i go to TR hotkey > Navigate > Courses > select my course > Do course... It shows the track and topographical information, contours, tracks, poi, etc

however, when I go to TR hotkey > Trail Run > press and hold ML button to get menu > Navigation > Courses > select my course > Do Course... It loads the gpx track but does not show any topographical data on the map, just a blank background and the course...

I need to load the course via the Trail Run so that it logs correctly on Garmin Connect and Strava...

Am i missing a configuration setting, or does the map not show the way i think it should?

Many thanks for any insight...