fixed

packages/app/test/cypress/integration/20-basic-features/access-to-page.spec.ts

@@ -32,9 +32,10 @@ context('Access to page', () => {
 
   it('/Sandbox/Math is successfully loaded', () => {
     cy.visit('/Sandbox/Math');
+    cy.waitUntilSkeletonDisappear();
 
-    // eslint-disable-next-line cypress/no-unnecessary-waiting
-    cy.wait(2000); // wait for 2 seconds for MathJax.typesetPromise();
+    // for check download toc data
+    cy.get('.toc-link').should('be.visible');
 
     cy.screenshot(`${ssPrefix}-sandbox-math`);
   });