Currently when conditionally placing blocks on the page based on entity conditions (for example show block only on articles), the block will not appear when it needs to. This is because the iframe preview param is mercury_editor_entity and not the name of the entity as most plugins would assume. This will cause variations in the preview for authors where their editing experience does not match their public experience.
Place a block in a region, only to be viewed on a specific node type. See that in the preview iframe, the block does not render.
Change the iframe preview to use the canonical route for an entity controlled by a get param in the URL.
Fixed
2.1
Code
Automatically closed - issue fixed for 2 weeks with no activity.