RenderDocument & RenderDocumentFeed not working with REST

1. install Nuxeo
2. create a Note document
3. issue the following command (please replace the credentials, hostname and document id to make the command work:

   curl -u Administrator:Administrator -X POST 'http://localhost:8080/nuxeo/api/v1/automation/Render.Document' \
   --header 'Content-Type: application/json' \
   --data-raw '{
       "params": {
       	"template": "foo ${Document['\''dc:title'\'']} bar",
           "type": "ftl"
       },
       "input": "52cb4a1e-514f-4373-b121-7f0960334ecd",
       "context": {}
   }'
   

Result is:

foo  bar

Expected behavior: the result should be

foo MYNOTETITLE bar

Note: RenderDocumentFeed seems to have the same behavior