QString::fromWCharArray triggers the assertion: "(misalignment & 1) == 0"

I received data from a socket which contains string data with offset. When I call QString::fromWCharArray the assertion triggered, and when I switch to QString::fromStdWString everything works fine.

ASSERT: "(misalignment & 1) == 0" in file C:\Users\qt\work\qt\qtbase\src\corelib\text\qstring.cpp, line 414

void qstring_fromwchararray_test()
{
    struct StructA
   

;
    struct StructB
   

;
    char buf[sizeof(StructA) + sizeof(StructB)];
    auto sa = (StructA*)buf;
    auto sb = (StructB*)&buf[sizeof(StructA)];
    sa->type = 1;
    memset(sb->text, 0, sizeof(sb->text));
    wcscpy_s(sb->text, L"test string.");
    QString qtext = QString::fromWCharArray(sb->text); // crash
    qDebug() << qtext;
}