Photoshop 24.7.0: C++-SDK: Background-layer available returns false if there is only a background-la

In my plugin I have code which checks whether a background layer is available:

#include <PIActions.h>
#include <PISuites.h>

SPErr PhotoShopHelper::HasBackgroundLayer(bool& hasBackground)
{
    hasBackground = false;
    Auto_Desc result(false);
    Auto_Ref reference;
    SPErr error = sPSActionReference->PutProperty(reference.get(), classBackgroundLayer, keyBackground);
    if (error)
        return error;

    error = sPSActionReference->PutEnumerated(reference.get(), classDocument, typeOrdinal, enumTarget);
    if (error)
        return error;

    // ignore the error on purpose, we may not have a background layer
    (void)sPSActionControl->Get(&result, reference.get());
    if (result.get() != NULL)
    {
        Boolean hasKey = false;
        Logger::WriteToLog(QString("Check for Background Layer: -> Has Key"));

        error = sPSActionDescriptor->HasKey(result.get(), keyName, &hasKey);
        if (error)
        {
            return error;
        }

        if (hasKey)
        {
            hasBackground = true;
        }
    }
     return error;
}

Until Version 24.6, The HasKey returned true if there is a background-layer available.

In Version 24.7, it will return true only if there is another layer (or more) available. If there is only a background-layer, it will return false.

Expectaition would be that it will return true in all cases a Background-layer is availabe (as before 24.7)