Cannot return search results in 'Configure a Confluence knowledge base'

When attempting to link a Confluence space as a knowledge base there are two issues:

1. Only 50 results can be returned as described in Confluence REST API, specifically '@link DefaultRestSpaceManager#DEFAULT_MAX_SIZE' which is set at 50.
2. A typed query for a space will result in a spinner and no results returned.

The typed query does perform a successful request, however these results are not rendered:

Example:
Available Spaces:

confluence=# select spacename from spaces;
      spacename
---------------------
 PDF Export
 Demonstration Space
 COMPY
 Epic Check
 Customiser
 Inherit
 Trial
(7 rows)

Request URL:

Request URL:https://<ondemand-url>/rest/servicedesk/1/servicedesk/SER/kb/232badc9-aa3b-36cf-9dc0-50eb4eef759d/space?query=Epic&_=1409546835409

Response:

{"queryTokens":["epic"],"query":"Epic","contentNameMatches":[[{"id":"1245187","name":"Epic Check","href":"/wiki/display/EC","className":"content-type-spacedesc","spaceName":"Epic Check","spaceKey":"EC"}],[{"name":"Search for ‘Epic’","href":"/wiki/dosearchsite.action?queryString=Epic","className":"search-for"}]]}

Effect in JIRA ServiceDesk UI:

Workaround 1: Using temporary user profile

• Create a temporary profile with access to administer the JIRA ServiceDesk as an individual here and
• Permission the temporary profile as an individual to see the desired space in Confluence. This will restrict the items displayed in the drop-down

Workaround 2: Database Edit

• Select and set a space from the 50 available results
• Confirm the desired space key from Confluence, including Space Key, Space Name and Space URL
• Raise a request via support.atlassian.com to perform an update on the table "AO_54307E_CONFLUENCEKB" linking to the desired space key