StackLayout object gives segmentation fault when using with generalmagic's MapView object

I am working on map example using with GeneralMagic SDK. It appears that when I use generalmagic's QML Type MapView in StackLayout, application fails with segmentation fault (backtrace.log). If StackLayout's default currentindex is page which contains MapView object, application succesfully opens. When I try to change currentindex to other page and back again the page which contains MapView object, the application fails with segmentation fault.
In order to reproduce the problem, one should first download the .so file from given link above. Then move library files to (Qt5.12.0/5.12.0/gcc_64/qml/GeneralMagic/) path. Then, please use the attached code for reproduction.
GeneralMagic's web page: https://www.generalmagic.com/maps-sdk-for-qt/
generalmagic library can be found in https://packages.generalmagic.com/qt/