You're using the site name prefix parameter in Joomla which forces the menu item title so it can prefix. That'll result in your meta data being overridden; at least for page title. Will review moving the metadata function call to be before the trigger to allow your usage to override the menu in next GJ release.
forge.joomlapolis.com/issues/7346
You shouldn't need to do anything with your auto actions and will simply work again once the meta output is moved. This should be implemented this or next week as we've just released CB 2.3 and can now prepare GJ release and will put this feature in that release.