UI crashes the second time vehicle app is opened (in single process mode)

[WARN | default] QQmlComponent: Created graphical object was not placed in the graphics scene.
*** process /home/ubuntu/neptune3/build/neptune3-ui (7994) crashed ***
> why: uncaught signal 11 (Segmentation fault)
> backtrace:
1: /home/ubuntu/neptune3/build/neptune3-ui() [0x5256b3]
2: /home/ubuntu/neptune3/build/neptune3-ui() [0x5245f0]
3: /lib/x86_64-linux-gnu/libpthread.so.0(+0x11390) [0x7f639e32f390]
4: QMutex::lock() [+0x48]
5: /home/ubuntu/Qt/5.10.1/gcc_64/qml/QtQuick/Scene3D/libqtquickscene3dplugin.so(+0x8bb3) [0x7f62d6640bb3]
6: QMetaObject::activate(QObject*, int, int, void**) [+0x986]
7: QQuickItem::windowChanged(QQuickWindow*) [+0x32]
8: QQuickItemPrivate::refWindow(QQuickWindow*) [+0x140]
9: QQuickItemPrivate::refWindow(QQuickWindow*) [+0xe4]
10: QQuickItemPrivate::refWindow(QQuickWindow*) [+0xe4]
11: QQuickItemPrivate::refWindow(QQuickWindow*) [+0xe4]
12: QQuickItemPrivate::refWindow(QQuickWindow*) [+0xe4]
13: QQuickItem::setParentItem(QQuickItem*) [+0x2ed]
14: /home/ubuntu/Qt/5.10.1/gcc_64/lib/libQt5Quick.so.5(+0x1ec941) [0x7f63a0baf941]
15: QQuickItem::qt_metacall(QMetaObject::Call, int, void**) [+0xdb]
16: /home/ubuntu/Qt/5.10.1/gcc_64/lib/libQt5Qml.so.5(+0x26963a) [0x7f639f95463a]
17: QQmlPropertyPrivate::write(QObject*, QQmlPropertyData const&, QVariant const&, QQmlContextData*, QFlags<QQmlPropertyData::WriteFlag>) [+0x316]
18: QV4::QObjectWrapper::setProperty(QV4::ExecutionEngine*, QObject*, QQmlPropertyData*, QV4::Value const&) [+0x6c0]
19: QV4::Runtime::method_setQmlQObjectProperty(QV4::ExecutionEngine*, QV4::Value const&, int, QV4::Value const&) [+0xcb]
20: [0x7f639005d3d0]

> the process will be aborted (core dump)
The program has unexpectedly finished.
The process was ended forcefully.