Check if the buttons are there before rendering it

In some cases WC replaces the checkout form only partially leaving the buttons there

modules.local/ppcp-button/resources/js/modules/Renderer.js

@@ -1,10 +1,18 @@
 class Renderer {
     render(wrapper, buttonConfig) {
+        if (this.isAlreadyRendered(wrapper)) {
+            return;
+        }
+
         paypal.Buttons(
             buttonConfig,
         ).render(wrapper);
     }
 
+    isAlreadyRendered(wrapper) {
+        return document.querySelector(wrapper).hasChildNodes();
+    }
+
     hideButtons(element) {
         document.querySelector(element).style.display = 'none';
     }