Question is not in the hash with it is on the first page & questionsO…

…nPageMode is 'questionPerPage' fix #8583

src/survey.ts

@@ -4297,6 +4297,9 @@ export class SurveyModel extends SurveyElementCore
   private isLockingUpdateOnPageModes: boolean;
   private setupPagesForPageModes(isSinglePage: boolean, isFirstLoad: boolean) {
     this.questionHashesClear();
+    if(!isSinglePage && this.firstPageIsStarted && this.pages.length > 0) {
+      this.pages[0].questions.forEach(q => this.questionHashesAdded(q));
+    }
     this.isLockingUpdateOnPageModes = !isFirstLoad;
     var startIndex = this.getPageStartIndex();
     super.startLoadingFromJson();

tests/surveytests.ts

@@ -20247,4 +20247,25 @@ QUnit.test("survey navigateToUrl encode url", function (assert) {
 
   survey.doComplete();
   assert.equal(location.href, "javascript%3Aalert(2)", "encoded URL");
+});
+QUnit.test("Question is not in the hash with it is on the first page & questionsOnPageMode is 'questionPerPage', Bug#8583", function (assert) {
+  const survey = new SurveyModel({
+    "pages": [{
+      "elements": [{
+        "type": "text",
+        "name": "q1"
+      }
+      ]
+    },
+    {
+      "elements": [{
+        "type": "text",
+        "name": "q2"
+      }] }],
+    "firstPageIsStarted": true,
+    "questionsOnPageMode": "questionPerPage",
+  });
+
+  const q = survey.getQuestionByName("q1");
+  assert.equal(q.name, "q1", "q1 name is here");
 });