diff --git a/ui (gen4)/features/collections.js b/ui (gen4)/features/collections.js
index 0476ba68..0e870960 100755
--- a/ui (gen4)/features/collections.js	
+++ b/ui (gen4)/features/collections.js	
@@ -201,9 +201,14 @@ var CollectionActions = actions.Actions({
 	// XXX revise doc...
 	// XXX this is almost the same as .store_handlers...
 	get collection_handlers(){
-		return this.cache('collection_handlers', function(){
+		return this.cache('collection_handlers', function(handlers){
+			// cached value...
+			if(handlers){
+				return Object.assign({}, handlers)
+			}
+
 			var that = this
-			var handlers = {}
+			handlers = {}
 
 			handlers['data'] = null
 			this.actions.forEach(function(action){
diff --git a/ui (gen4)/features/core.js b/ui (gen4)/features/core.js
index 75515c71..bc61a47d 100755
--- a/ui (gen4)/features/core.js	
+++ b/ui (gen4)/features/core.js	
@@ -831,10 +831,25 @@ module.Cache = ImageGridFeatures.Feature({
 					this.preCache() 
 				: false
 			}],
+
+		/*/ XXX clear cache when feature/action topology changes...
+		[[
+			'inlineMixin',
+			'inlineMixout',
+
+			// XXX not sure about this...
+			'mixout',
+		],
+			function(){
+				// XXX should this trigger a recache???
+				this.clearCache()
+			}],
+		//*/
 	],
 })
 
 
+
 //---------------------------------------------------------------------
 // Timers...