Steps to reproduce

1.  Go to https://demo.magnolia-cms.com/
2.  Upload new image in Assets app
3. Go to https://demo.magnolia-cms.com/.magnolia/admincentral#app:tours:detail;/magnolia-travels/Vietnam--Tradition-and-Today:edit
4. Change image to the newly uploaded one
5. Go to https://demo.magnolia-cms.com/.rest/delivery/tours/v1/magnolia-travels/Vietnam--Tradition-and-Today

Expected results

Should get the JSON response with image.

Actual results

Get partial JSON response with error.
...
ight even teach you to cook it too.</p>\n","destination":[

],"duration":"14"{"error":{"code":"unknown","message":null}}

Workaround

I tried to change it to:

referenceResolver:
      class: info.magnolia.rest.reference.jcr.JcrReferenceResolverDefinition
      targetWorkspace: dam

But JcrReferenceResolverDefinition also does not seem to pick it up

Do not use asset reference resolvers.
But that's not really a good workaround

Development notes