QtCreator crashes when debugging

I develop complex application - it has QWidget laying on QGraphicsScene via QGraphicsProxyWidget. In the QWidget it has child QQuickWidget with ListView inside it. The ListView is not large - some sheet with just about 20 rows. But each row is complex. It includes graphics images (2 from files, 1 from resource), texts and checkbox. There are some control QButtons at scene bottom. Entire scene with all it's content is scaled to fit smartphone screen. This is main reason why I use QGraphicsScene - it allows scale all elements on it at once.

And sometimes application synchronizes with Google Calendar in my Java code. But looks like that was not problem reason.

The workstation uses Linux Kubuntu 18.04 on AMD X2 64 processor. I debug apps on Honor 6X smartphone connected to workstation via USB2 cable. I started debug my app assembled in Debug mode for armv7 architecture. It works. But when I some time just scroll ListView by finger up and down - the QtCreator suddenly crashes. Application continues work on smartphone. I reproduced this behavior several times. QtCreator crashes after 5-10 scrolls up and down.

Sorry I cannot give my application for investigation. But this is definitely QtCreator bug.