Do Logic effect AUs support aux output buses?

Hi all,

Does anyone know if Logic effects plugins can have more than one output bus? Specifically not instrument plugins, I know those support aux outs!

I am trying to design a plugin that is stereo out, with two additional mono out buses but Logic keeps failing when loading. There is no issue with validation, it just gives me a dialog when the plugin is added to the track.

Anyone know if this is supported behavior, or what I may be doing wrong? It is currently registered as an aufx plugin.

If anyone has any examples of plugins that do this, that would also be helpful!