I am running on CiviCRM 5.21.1, and have just upgraded CiviRules from 2.11 to 2.13.
I have several Rules which test for the Type of a Contact by using e.g. "Field Value Comparison Contact.contact_type=Individual"
After the upgrade this rule does not fire, and the Condition appears on the Rules Management screen as "Field Value Comparison Contact.contact_type=". If I try to recreate the condition I get the same result, and I can see no other way of making this test.
I will have to stay on CiviRules 2.11 until this is fixed.