Blocker Description
Can be reproduced easily with:
{{liveData
id="users"
properties="_avatar,doc.name,first_name,last_name"
source="liveTable"
sourceParameters="className=XWiki.XWikiUsers&translationPrefix=xe.userdirectory."
/}}
The selection column is visible and the number of rows matches the number of entries, but the columns corresponding to the specified properties are hidden.