diff --git a/packages/survey-core/src/question_multipletext.ts b/packages/survey-core/src/question_multipletext.ts
index e631a6093a..3d749bd8df 100644
--- a/packages/survey-core/src/question_multipletext.ts
+++ b/packages/survey-core/src/question_multipletext.ts
@@ -459,6 +459,9 @@ export class QuestionMultipleTextModel extends Question
   onSurveyLoad() {
     this.editorsOnSurveyLoad();
     super.onSurveyLoad();
+    if(!Helpers.isValueEmpty(this.rows)) {
+      this.calcVisibleRows();
+    }
   }
   setQuestionValue(newValue: any, updateIsAnswered: boolean = true) {
     super.setQuestionValue(newValue, updateIsAnswered);
@@ -649,7 +652,6 @@ export class QuestionMultipleTextModel extends Question
   protected onRowCreated(row: MutlipleTextRow) {
     return row;
   }
-
   private calcVisibleRows() {
     const colCount = this.colCount;
     const items = this.items;
diff --git a/packages/survey-core/tests/question_multipletexttests.ts b/packages/survey-core/tests/question_multipletexttests.ts
index b7fbe7cc3f..fb75455f1e 100644
--- a/packages/survey-core/tests/question_multipletexttests.ts
+++ b/packages/survey-core/tests/question_multipletexttests.ts
@@ -242,6 +242,40 @@ QUnit.test("defaultValueExpression executing", (assert) => {
   q1.items[1].value = 5;
   assert.equal(q1.items[2].editor.value, 15, "Calculated correctly");
 });
+QUnit.test("Make inputSize invisible by default", (assert) => {
+  const prop = Serializer.findProperty("multipletext", "inputSize");
+  assert.strictEqual(prop.visible, false);
+});
+QUnit.test("mutltipletext fromJSON, bug#9400", (assert) => {
+  const survey = new SurveyModel({
+    questions: [
+      {
+        type: "multipletext",
+        name: "q1",
+        items: [
+          {
+            name: "item1"
+          },
+          {
+            name: "item2"
+          },
+          {
+            name: "item3",
+            defaultValueExpression: "{q1.item1} + {q1.item2}"
+          }
+        ]
+      }
+    ]
+  });
+  const q1 = <QuestionMultipleTextModel>survey.getQuestionByName("q1");
+  const q2 = <QuestionMultipleTextModel>survey.currentPage.addNewQuestion("multipletext", "q2");
+  assert.equal(q2.rows.length, 2 * 2, "rows #1");
+  const json = q1.toJSON();
+  delete json["name"];
+  q2.fromJSON(json);
+  assert.equal(q2.items.length, 3, "items");
+  assert.equal(q2.rows.length, 3 * 2, "rows # 2");
+});
 QUnit.test("Make inputSize invisible by default", (assert) => {
   const prop = Serializer.findProperty("multipletext", "inputSize");
   assert.strictEqual(prop.visible, false);