Can't Change Instrument Preset in a Multi Instrument

I just started using the Multi Insturments feature, so pardon if I am missing something obvious.

I have two instances of Mai Tai in a Multi Instrument Track. My problem is I can't change the preset for Mai Tai while it is in a Multi Instrument; when I click on a preset in the dropdown menu, nothing happens. I can change the preset just fine when Mai Tai is by itself on it's own track.

If it's important, the presets I'm trying to switch to are "Instrument + FX" presets. Do they need to be saved as a different knid of preset?

Thanks