Saving a document via the inline editor resets the Tags document's property

When a document is edited and saved via inline editor, tags property get set to the empty string.
Steps to reproduce the bug:
Choose a document with includeForm macro (e.g. a xwiki user profile)
1. Edit the document in wiki mode and add one or more tags
2. Save the document
(check the tags have been added to the document)
3. Edit the document via inline form
4. Save the document (Save and View)
Check tags property, the tags added at point 1. have been deleted, the property is now set to the empty string.