The property "contentStatus" in XML export is always "current"

In an XML export, the following element has always the same value, regardless of the real status of the content:

<property name="contentStatus"><![CDATA[current]]></property>

Steps to reproduce error:

1. Export Space to XML as described here: https://confluence.atlassian.com/x/KSEC (XML -> Normal Export)
2. Unzip the file
3. Open the file entities.xml