Tracktion Engine: AUv3 plugin instantiation

I am trying to use AUv3 plugins with TE on iOS.
I have set allowPluginsWhichRequireAsynchronousInstantiation = true;
After, this, the engine is able to scan and see my AUv3 plugins. However, it looks I can’t instantiate them. I am wondering if TE:engine is using createPluginInstance in the place of createPluginInstanceAsync. Is there anything else I should set to make the AUv3 plugins work inside the TE:engine?

We haven’t much done testing of the engine on iOS, so this is something we will need to investigate. You are probably correct it isn’t using createPluginInstanceAsync.