fix: reset page validity

src/app/form/form-view/form-view.component.ts

@@ -377,6 +377,7 @@ export class FormViewComponent implements OnInit {
   }
   public setCurrentStep(step: stepType): void {
     //THIS PROBABLY CREATES CONSOLE ERRORS NG100 only in dev mode, please refer to https://angular.io/errors/NG0100 for more info
+    this.isPageValid = false;
     this.currentPage = step;
   }
   public async saveEditedStructure() {