AUT crashes on raspberry pi4

I'm currently using Squish 7.0.1 to test "gallery" app(available in Qt Creator as an example) built in Qt 5.15.5 for raspberry pi4.
The issue is, when I scroll the Flickable too fast, the app exits for some reason.
Does anyone know the possible root cause of it?? 
 
[here is a backtrace I got in the attached video]

1. ***** The application CRASHED at this point! *****
2. Backtrace:
3. (0) /home/embedded_squish_build_folder/lib/libsquishhook.so(+0x6ebc6) [0xb129bbc6]
4. (1) /home/embedded_squish_build_folder/lib/libsquishhook.so(+0x4e53a) [0xb127b53a]
5. (2) /lib/libc.so.6(+0x29d80) [0xb6127d80]
6. (3) /home/embedded_squish_build_folder/lib/libsquishqtwrapper.so (Squish::QtWrapper::wrapQObject(QObject*))) [0xb16731ac]
7. (4) /home/embedded_squish_build_folder/lib/libsquishqtwrapper.so (Squish::QtWrapper::wrapAndRegisterQObject(QObject*))) [0xb1672f5e]
8. (5) /home/embedded_squish_build_folder/lib/extensions/qt/../../libsquishqtquickcommon.so (Squish::QtWrapper::QtQuickFlickEventGenerator::compressFlickEvent(QQuickItem*, QPointF const&, QQuickItem*, Squish::QtWrapper::SyntheticEvent::FlickState))) [0xae61ffd4]
9. (6) /home/embedded_squish_build_folder/lib/extensions/qt/../../libsquishqtquickcommon.so (Squish::QtWrapper::QtQuickFlickEventGenerator::flickEnded(QQuickItem*, QPointF const&, QQuickItem*))) [0xae620120]
10. (7) /home/embedded_squish_build_folder/lib/extensions/qt/../../libsquishqtquickcommon.so(+0x172d4) [0xae6192d4]
11. (8) /usr/lib/libQt5Core.so.5(+0x2217a8) [0xb657a7a8]