diff --git a/howso/hierarchy.amlg b/howso/hierarchy.amlg
index 9a53d4b41..f3f27390f 100644
--- a/howso/hierarchy.amlg
+++ b/howso/hierarchy.amlg
@@ -887,6 +887,7 @@
 					;else it's just the number of cases
 					(call !GetNumTrainingCases)
 				)
+			has_inactive_features (size !inactiveFeaturesMap)
 		))
 
 		;clear all query caches
@@ -970,6 +971,10 @@
 					(contained_entities subtrainee (query_exists !internalLabelSession))
 				)
 
+				(if (size (call_entity subtrainee "debug_label" (assoc label "!inactiveFeaturesMap")))
+					(assign (assoc has_inactive_features .true))
+				)
+
 				;move all sessions over from subtrainee to trainee
 				(map
 					(lambda
@@ -1007,8 +1012,10 @@
 		))
 		(call !UpdateRegionalMinSize (assoc dataset_size (call !GetNumTrainingCases) ))
 		(call !ClearCachedDataProperties)
-		(if !inactiveFeaturesMap
-			(assign_to_entities (assoc !inactiveFeaturesNeedCaching .true ))
+
+		;if this trainee or any of the subtrainees had inactive features, make sure they are recomputed here
+		(if has_inactive_features
+			(call !UpdateInactiveFeatures)
 		)
 
 		(accum_to_entities (assoc !dataMassChangeSinceLastAnalyze (- new_dataset_size pre_combine_dataset_size) ))