JUCE 4.3.0: AudioProcessor::setchannelLayoutOfBus failing to switch hosted Kontakt instance from stereo to 32 output

General JUCE discussion
2

the code in setchannelLayoutOfBus returns false here
( the test : layouts.getChannelSet (isInputBus, busIdx) == layout. fails )

    if (layouts.getChannelSet (isInputBus, busIdx) == layout)
        return applyBusLayouts (layouts); 

    return false;