update:更新

src/components/layout-element/media/app-field-image-dynamic/app-field-image-dynamic.vue

@@ -46,7 +46,7 @@ export default class AppFieldImageDynamic extends Vue {
      *
      * @memberof AppFieldImageDynamic
      */
-    @Watch('value')
+    @Watch('value',{immediate: true})
     onValueChange(newVal: any, oldVal: any) {
         this.handleDynaImg();
     }