REPORT does not show contenttype

Using

curl --request REPORT \
  --url http://localhost/nc/remote.php/dav/files/tobi/ \
  --header 'authorization: Basic dG9iaTpTSGZ6ZC04YkQyNC1xOUtSaS1zU2NRay03ZHh4eA==' \
  --data '<?xml version="1.0" encoding="UTF-8"?>
<oc:filter-files xmlns:oc="http://owncloud.org/ns">
    <oc:filter-rules>
        <oc:favorite>1</oc:favorite>
    </oc:filter-rules>
    <D:prop xmlns:D="DAV:">
        <oc:owner-id />
        <D:creationdate />
        <D:getetag />
        <oc:permissions />
        <D:getlastmodified />
        <oc:id />
        <D:getcontentlength />
        <oc:favorite />
        <nc:mount-type xmlns:nc="http://nextcloud.org/ns" />
        <nc:note xmlns:nc="http://nextcloud.org/ns" />
        <D:getcontenttype />
        <nc:has-preview xmlns:nc="http://nextcloud.org/ns" />
        <oc:size />
        <nc:is-encrypted xmlns:nc="http://nextcloud.org/ns" />
        <oc:owner-display-name />
        <oc:comments-unread />
    </D:prop>
</oc:filter-files>'

I do not get a contenttype on folders:

<d:response>
    <d:status>HTTP/1.1 200 OK</d:status>
    <d:href>/nc/remote.php/dav/files/tobi/InstantUpload</d:href>
    <d:propstat>
      <d:prop>
        <oc:owner-id>tobi</oc:owner-id>
        <d:getetag>&quot;5da5a10e3b3d5&quot;</d:getetag>
        <oc:permissions>RGDNVCK</oc:permissions>
        <d:getlastmodified>Tue, 15 Oct 2019 10:35:58 GMT</d:getlastmodified>
        <oc:id>00000984ocjycgrudn78</oc:id>
        <oc:favorite>1</oc:favorite>
        <nc:mount-type></nc:mount-type>
        <nc:note></nc:note>
        <nc:has-preview>false</nc:has-preview>
        <oc:size>28800316</oc:size>
        <nc:is-encrypted>0</nc:is-encrypted>
        <oc:owner-display-name>Kaminsky Tobias</oc:owner-display-name>
        <oc:comments-unread>0</oc:comments-unread>
      </d:prop>
      <d:status>HTTP/1.1 200 OK</d:status>
    </d:propstat>
    <d:propstat>
      <d:prop>
        <d:creationdate/>
        <d:getcontentlength/>
        <d:getcontenttype/>
      </d:prop>
      <d:status>HTTP/1.1 404 Not Found</d:status>
    </d:propstat>
  </d:response>

same for
<d:creationdate/>
nc:is-encrypted/
<d:creationdate/>
<d:getcontentlength/>
<d:getcontenttype/>

@nextcloud/server-triage can someone confirm this?

Start by reproducing the supplied curl REPORT request against a Nextcloud server and inspect the XML response for folder properties. Trace the REPORT handling and property generation until you can identify why getcontenttype returns 404 for folders; done means the response includes the expected content type for folders and the existing properties remain correct.