ArrayBuffer to QByteArray conversion failes for QT 6.5.2

In the attached code snippets, I try to transfer an ArrayBuffer from QML to a C++ handler, where it is supposed to get converted into a QByteArray. This is working in QT 6.5.1 and the QByteArray is received. This stopped working in QT 6.5.2.

If I change the type to QVariantList, the data is received correctly as QVariantList. Still, I expect the implicit conversion would fill the QBytaArray.