MC-4294: Cannot Activate Tab Item After Moving Tabs or Slider to New Parent Container

Rebuild slick only if it's been deemed ready from a previous build

Author: danmooney2

app/code/Magento/PageBuilder/view/adminhtml/web/js/content-type/slider/preview.js

@@ -173,7 +173,14 @@ export default class Preview extends PreviewCollection {
      */
     public afterChildrenRender(element: HTMLElement): void {
         this.element = element;
-        this.buildSlick();
+
+        const isARerenderingOfSlider = this.ready;
+
+        // if slider has been re-rendered previously on this element, re-build
+        if (isARerenderingOfSlider) {
+            this.buildSlick();
+        }
+
         super.afterChildrenRender(element);
         this.afterChildrenRenderDeferred.resolve(element);
     }