check for map update

Hi.
I use Mapfactor Navigator 2.2.78.
I recently replaced my Sony Xperia SP Android 4.3 by a Samsung Galaxy A3 (2017) Android 6.0.1.
In settings, "check map updates" is checked.
I can see in "map management" that there are map updates available.
However I don't receive any notification of map updates.
It used to work with my previous phone.
Have you got an explanation ?
Thanks.