Incorrect parameter names for AU plugins (at runtime)

I’m using JUCE 5.4 to host AU plugins and when retrieving their parameters they do not seem to update if they change at plugin runtime? This seems to work fine with VST’s, but possibly the plugin instance on the JUCE side is not being updated. I know this was previously a missing feature, has this been fixed?

This seems to be a related issue AudioUnitPluginInstance::getParameters() always returns an empty list