Revision History - Columns User and State are empty

When the hippostdpubwf:document mixin is added to the document instead of the document (primary) type.

Possible explanation:
org.hippoecm.frontend.plugins.reviewedactions.list.resolvers.StateIconAttributes checks the nodetype and mixins of a document, only in the in context of reviewedactions, the document is not a real document, but a frozen document. And for frozen documents, the mixingtypes are 'hidden' under the property jcr:FrozenMixinTypes.