Fixed old iid update

app/assets/javascripts/vue_shared/components/sidebar/labels_select_widget/dropdown_contents.vue

@@ -122,13 +122,16 @@ export default {
       if (newVal) {
         this.$refs.dropdown.show();
         this.isDirty = false;
+        this.localSelectedLabels = this.selectedLabels;
       } else {
         this.$refs.dropdown.hide();
         this.setLabels();
       }
     },
     selectedLabels(newVal) {
-      this.localSelectedLabels = newVal;
+      if (!this.isDirty) {
+        this.localSelectedLabels = newVal;
+      }
     },
   },
   created() {

app/assets/javascripts/vue_shared/components/sidebar/labels_select_widget/labels_select_root.vue

@@ -106,7 +106,6 @@ export default {
       issuableLabels: [],
       labelsSelectInProgress: false,
       oldIid: null,
-      isEditing: false,
     };
   },
   computed: {
@@ -138,11 +137,7 @@ export default {
   },
   watch: {
     iid(_, oldVal) {
-      if (this.isEditing) {
-        this.oldIid = oldVal;
-      } else {
-        this.oldIid = null;
-      }
+      this.oldIid = oldVal;
     },
   },
   methods: {
@@ -259,8 +254,7 @@ export default {
         :title="__('Labels')"
         :loading="isLoading"
         :can-edit="allowLabelEdit"
-        @open="isEditing = true"
-        @close="isEditing = false"
+        @open="oldIid = null"
       >
         <template #collapsed>
           <dropdown-value