Entering choice value into other comment works incorrectly if storeOt…

packages/survey-core/src/question_baseselect.ts

@@ -624,11 +624,27 @@ export class QuestionSelectBase extends Question {
       this.isSettingComment = true;
       this.otherValueCore = newValue;
       if (this.isOtherSelected && !this.isRenderedValueSetting) {
-        this.value = this.rendredValueToData(this.renderedValue);
+        this.value = this.getValueOnSettingOther(newValue);
       }
       this.isSettingComment = false;
     }
   }
+  private getValueOnSettingOther(otherValue: string): any {
+    const val = this.rendredValueToData(this.renderedValue);
+    if(this.showCommentArea || this.getStoreOthersAsComment()) return val;
+    const item = ItemValue.getItemByValue(this.visibleChoices, otherValue);
+    if(!item || item === this.otherItem) return val;
+    this.otherValueCore = "";
+    if(!Array.isArray(val)) return otherValue;
+    const index = val.indexOf(this.otherItem.value);
+    if(index > -1) {
+      val.splice(index, 1);
+    }
+    if(val.indexOf(otherValue) < 0) {
+      val.push(otherValue);
+    }
+    return val;
+  }
   public clearValue(keepComment?: boolean) {
     super.clearValue(keepComment);
     this.prevOtherValue = undefined;

packages/survey-core/tests/question_baseselecttests.ts

@@ -2313,6 +2313,33 @@ QUnit.test("dropdown.clearValue(true) for showCommentArea & showOtherItem, bug#8
   assert.equal(q4.value, undefined, "q4.value");
   assert.notOk(q4.comment, "q4.comment");
 });
+QUnit.test("storeOthersAsComment & entering comment equals to the value in the choice, bug#9619", (assert) => {
+  const survey = new SurveyModel({
+    elements: [
+      { type: "radiogroup", name: "q1", choices: ["red", "yellow", "green"], "showOtherItem": true },
+      { type: "checkbox", name: "q2", choices: ["red", "yellow", "green"], "showOtherItem": true }
+    ],
+    storeOthersAsComment: false
+  });
+  const q1 = <QuestionRadiogroupModel>survey.getQuestionByName("q1");
+  q1.value = "other";
+  assert.equal(q1.isOtherSelected, true, "q1, isOther is selected");
+  q1.comment = "red";
+  assert.equal(q1.value, "red", "q1, value is red");
+  assert.equal(q1.selectedItem.value, "red", "q1, Make the red item seleted");
+  assert.equal(q1.isOtherSelected, false, "q1, isOther is not selected");
+  const q2 = <QuestionCheckboxModel>survey.getQuestionByName("q2");
+  q2.value = ["green", "other"];
+  assert.equal(q2.isOtherSelected, true, "q2, isOther is selected, #1");
+  q2.comment = "red";
+  assert.deepEqual(q2.value, ["green", "red"], "q2, Make the red item seleted, #1");
+  assert.equal(q2.isOtherSelected, false, "q2, isOther is not selected, #1");
+  q2.value = ["green", "other"];
+  assert.equal(q2.isOtherSelected, true, "q2, isOther is selected, #2");
+  q2.comment = "green";
+  assert.deepEqual(q2.value, ["green"], "q2, Make the red item seleted, #2");
+  assert.equal(q2.isOtherSelected, false, "q2, isOther is not selected, #2");
+});
 QUnit.test("valuePropertyName & complete trigger, bug#8434", (assert) => {
   const survey = new SurveyModel({
     "pages": [