[Neos] canonical tag with type reference show all pages

[Dominic Garms]

Hello,

I try to include a canonical tag into the BE with adjusting NodeTypes.yaml:

'TYPO3.Neos:Page':
   ui:
     inspector:
       groups:
         metaTagOptions:
           label: 'Meta Tag Options'
   properties:
     canonical:
       type: reference
       ui:
         label: 'Canonical Reference'
         inspector:
           group: metaTagOptions

Everything works good so far, but inside of the autocomplete all 
nodeTypes are displayed - from all sites including 
TYPO3.NeosDemoTypo3Ort. Is there an option possible, that only pages 
from the current domain could get displayed?

Regards,
Dominic