Qt-QML problem (crash) running on Windows DLL(static build)

Testing Qt-QML 6.4.1 on Windows 10, 64 , static library compiled with VS2019 MT flag

Running a simple example application on exit I detect an access violation reading location, this problem appears regularly on Windows but there are other problems on Linux Ubuntu 20 (not tested on Android), could you kindly investigate the cause or provide an alternative solution (to run Qt-QML on a Windows dll) ?

I attach all source files including qmake project files to create the executables and the resulting (generated for Windows) test.exe and libx.lib ,
as reported with Windows on exit it generates an access violation reading location 0x0000000000000068 (with a possible crash),
for me it's a serious inconvenience to run Qt-QML in a Windows dll

waiting for your kind reply. TEST_QTQML6.4.1_IN_WINDOWS_DLL.7z