fix(App): page root node remove/add (question/155057)

packages/uni-app-plus/dist/service.runtime.esm.dev.js

@@ -5541,8 +5541,8 @@ var Comment = /*@__PURE__*/(function (Node$$1) {
 
 function appendBody(doc, node, before) {
   var documentElement = doc.documentElement;
-
-  if (documentElement.pureChildren.length > 0 || node.parentNode) {
+  // fix append comment
+  if ((documentElement.pureChildren.length > 0 && node.nodeType === 1) || node.parentNode) {
     return
   }
   var children = documentElement.children;

packages/uni-app-plus/dist/service.runtime.esm.prod.js

@@ -4794,8 +4794,8 @@ var Comment = /*@__PURE__*/(function (Node$$1) {
 
 function appendBody(doc, node, before) {
   var documentElement = doc.documentElement;
-
-  if (documentElement.pureChildren.length > 0 || node.parentNode) {
+  // fix append comment
+  if ((documentElement.pureChildren.length > 0 && node.nodeType === 1) || node.parentNode) {
     return
   }
   var children = documentElement.children;