diff --git a/mmv1/third_party/terraform/services/container/resource_container_cluster_internal_test.go.tmpl b/mmv1/third_party/terraform/services/container/resource_container_cluster_internal_test.go.tmpl
index fd84d987f04c..e48e516d2545 100644
--- a/mmv1/third_party/terraform/services/container/resource_container_cluster_internal_test.go.tmpl
+++ b/mmv1/third_party/terraform/services/container/resource_container_cluster_internal_test.go.tmpl
@@ -664,6 +664,10 @@ func TestUnitFlattenClusterNodePools(t *testing.T) {
 						Optional: true,
 						Elem:     &schema.Resource{Schema: map[string]*schema.Schema{"create_pod_range": {Type: schema.TypeBool}}},
 					},
+					"ignore_node_count_changes": {
+						Type:     schema.TypeBool,
+						Optional: true,
+					},
 				},
 			},
 			Optional: true,
@@ -701,6 +705,7 @@ func TestUnitFlattenClusterNodePools(t *testing.T) {
 					"managed_instance_group_urls": []string{},
 					"version":                     "",
 					"network_config":              []map[string]interface{}{},
+					"ignore_node_count_changes":   false,
 				},
 				{
 					"name":                        "pool-2",
@@ -713,6 +718,7 @@ func TestUnitFlattenClusterNodePools(t *testing.T) {
 					"managed_instance_group_urls": []string{},
 					"version":                     "",
 					"network_config":              []map[string]interface{}{},
+					"ignore_node_count_changes":   false,
 				},
 			},
 			expectError: false,
diff --git a/mmv1/third_party/terraform/services/container/resource_container_cluster_test.go.tmpl b/mmv1/third_party/terraform/services/container/resource_container_cluster_test.go.tmpl
index da21832b9613..4fef9ccf9eb3 100644
--- a/mmv1/third_party/terraform/services/container/resource_container_cluster_test.go.tmpl
+++ b/mmv1/third_party/terraform/services/container/resource_container_cluster_test.go.tmpl
@@ -1992,7 +1992,7 @@ func TestAccContainerCluster_regionalWithNodePool(t *testing.T) {
 				ResourceName:		 "google_container_cluster.regional",
 				ImportState:		 true,
 				ImportStateVerify:	 true,
-				ImportStateVerifyIgnore: []string{"deletion_protection", "ignore_node_count_changes", "node_pool.0.ignore_node_count_changes"},
+				ImportStateVerifyIgnore: []string{"deletion_protection", "ignore_node_count_changes", "node_pool.0.ignore_node_count_changes", "node_pool.0.managed_instance_group_urls"},
 			},
 		},
 	})
diff --git a/mmv1/third_party/terraform/services/container/resource_container_node_pool.go.tmpl b/mmv1/third_party/terraform/services/container/resource_container_node_pool.go.tmpl
index e808ce486cb7..5716217bb398 100644
--- a/mmv1/third_party/terraform/services/container/resource_container_node_pool.go.tmpl
+++ b/mmv1/third_party/terraform/services/container/resource_container_node_pool.go.tmpl
@@ -158,6 +158,17 @@ func (instanceGroupManagerCache *instanceGroupManagerCache) needsRefresh(fullyQu
 	return time.Since(igm.updateTime) > instanceGroupManagerCache.ttl
 }
 
+func (instanceGroupManagerCache *instanceGroupManagerCache) invalidate(igmUrl string) {
+	instanceGroupManagerCache.mutex.Lock()
+	defer instanceGroupManagerCache.mutex.Unlock()
+
+	matches := instanceGroupManagerURL.FindStringSubmatch(igmUrl)
+	if len(matches) >= 4 {
+		delete(instanceGroupManagerCache.instanceGroupManagers, matches[0])
+	}
+}
+
+
 // We need to set ttl to 0 to disable caching in VCR testing.
 // This ensure all NP/MIG LIST requests are made consistently,
 // preventing non-deterministic behavior that would break VCR.
@@ -1524,6 +1535,7 @@ func flattenNodePool(d *schema.ResourceData, config *transport_tpg.Config, np *c
 		// or leave them empty. Passing the API URLs to igmUrls at least populates them for basic usage.
 		for _, url := range np.InstanceGroupUrls {
 			igmUrls = append(igmUrls, url)
+			igmCache.invalidate(url)
 		}
 	} else {
 		for _, url := range np.InstanceGroupUrls {
@@ -1563,6 +1575,7 @@ func flattenNodePool(d *schema.ResourceData, config *transport_tpg.Config, np *c
 		"managed_instance_group_urls": managedIgmUrls,
 		"version":             np.Version,
 		"network_config":      flattenNodeNetworkConfig(np.NetworkConfig, d, prefix),
+		"ignore_node_count_changes": d.Get(prefix + "ignore_node_count_changes"),
 	}
 
 	if np.Autoscaling != nil {
@@ -1867,6 +1880,11 @@ func nodePoolUpdate(d *schema.ResourceData, meta interface{}, nodePoolInfo *Node
 		if err := retryWhileIncompatibleOperation(timeout, npLockKey, updateF); err != nil {
 				return err
 		}
+		if urls, ok := d.GetOk(prefix + "instance_group_urls"); ok {
+			for _, u := range urls.([]interface{}) {
+				igmCache.invalidate(u.(string))
+			}
+		}
 		log.Printf("[INFO] GKE node pool %s size has been updated to %d", name, newSize)
 	}