Check generation to ensure index working on same object

Signed-off-by: Tamal Saha <tamal@appscode.com>

pkg/cache/internal/cache_reader.go

@@ -148,7 +148,7 @@ func (c *CacheReader) List(_ context.Context, out client.ObjectList, opts ...cli
 					for i := range list {
 						obj := list[i].(client.Object)
 						key := client.ObjectKey{Namespace: obj.GetNamespace(), Name: obj.GetName()}
-						if _, exists := objmap[key]; exists {
+						if o, exists := objmap[key]; exists && o.(client.Object).GetGeneration() == obj.GetGeneration() {
 							numap[key] = obj
 						}
 					}