multi_output VSTi configuration saving

If we save a presets for a VSTi with multi-outputs bus, this configuration is not saved (mono output when reminder).

Exemple superior drummer with 5 or 6 output bus. If I remind the preset only one bus output is returned.

I save a model to keep my configuration, is there another way ? (track preset is not available for the VSTi multi-output)

Thanx