Images with internal references are not displayed by the editor

Follow these steps to reproduce:

• create a new page with this content:

  image:icon:accept
  

• edit the page with BlockNote

The image is not displayed in edit mode. You only see the image placeholder. The reason is that the generated UniAst syntax doesn't provide the image URL:

{
  "blocks" : [ {
    "type" : "image",
    "styles" : { },
    "target" : {
      "type" : "internal",
      "rawReference" : "icon:accept"
    }
  } ]
}

The same happens with attached images.