Sure there was no need to kill OSM Scout Server. The bug that prevents Pure Maps termination is not observed in the previous version of WhoGo, I hope that will be easily fixed.
During that short period I used navigation I didn't exactly follow the suggested route, as I know the area, so Pure Maps had to recalculate the route a couple of times. The back side of the device got hot, including the battery area, I have not measured consumption but within a period of 5min it lost around 10% - 15%, again that's my feeling, no actual figures. I will run a similar route again without using OSM Scout Server and report back to you any changes. thanks