@David-MP hmm, it definitely should not continue to suggest the same fastest route. When dismissing a suggestion, it should not be suggested again. If you however keep driving into a traffic jam and alternatives are available all the time, it might make sense again.

Anyhow, it does not really take that much space as it just overlaps your ETA information at that moment. Not any more "map" space.

You can turn it off by disabling the "traffic aware navigation" setting.