I do not know why.

I suspect that when you select a panel voice on the instrument that you are really selecting a registration that does the work of selecting the voice, dsp, eq etc.

There is no means of selecting registrations externally. If they used the registration "technique", they they would have found themselves with no way to reference them.

It is a serious issue for many users, and is made all the worse since it is not disclosed anywhere. Most everyone end up 'discovering' it the hard way.

The template solution is not ideal, but it does provide a workaround.

Regards,

Michael