Can't compare two XWikiDocument with password property initialized with a clear password anymore

{{groovy}}
doc1 = new com.xpn.xwiki.doc.XWikiDocument()
doc1.newObject('XWiki.XWikiUsers', xcontext.context)
doc2 = doc1.clone()

println doc1.equals(doc2)

password = "password"

doc1.getObject('XWiki.XWikiUsers').set('password', password, xcontext.context)
doc2.getObject('XWiki.XWikiUsers').set('password', password, xcontext.context)

println doc1.equals(doc2)
{{/groovy}}