I love navigator but for sometime it has had an annoying habit of crashing when going round roundabouts. Just to define 'crashing' clearly; 'going round roundabouts' - if I do a 3/4 turn or even go "round again" (when I've missed a turning) navigator seems to freeze or 'crash'. This does not happen with CoPilot or Here maps so there must be a bug somewhere.
I noticed this with the TomTom maps first and stopped using them and just stuck with OSM. With OSM it is better but still 'crashes'.
For a while I stopped using Navigator. As an HGV driver this coming week I will test again and hopefully I can send an error log.