Merge pull request #914 from FirelyTeam/feature/889-Additional-rules-…

…will-get-confused-by-hybrid-typed-trees

fix: #889 Additional rules will get confused by hybrid typed trees

src/Hl7.Fhir.Serialization/FhirXmlNode.cs

@@ -373,7 +373,8 @@ object checkOrder(ITypedElement node, IExceptionSource ies, object state)
                 if (PermissiveParsing) return null;
 
                 var sdSummary = node.Definition;
-                if (sdSummary == null) return null;
+                var serializationDetails = node.GetXmlSerializationDetails();
+                if (sdSummary == null || serializationDetails == null) return null;
 
                 if (state is OrderRuleState ors)
                 {