Page is timed out now and then on loading

Question

Time to time my initial page (login page) failing to load even if the waiting time increased. So my question is why sometimes it passes by and sometimes not , is that related to some external scrips or there something else?

     before(() => cy.fixture('users').then((u: { [key: string]: User }) => (user = u['preCreatedUser'])));

  beforeEach(() => {
    cy.visit(Route.LogIn);
    LogInPage.logIn(user.email, user.password);
  });

  it('should be able to create new btc crypto address', () => {
    TransactionsPage.myAssetsButton.should('contain.text', 'My assets').click();
    MyCryptoAddressesPage.chooseCryptoAssetTab('BTC');

    MyCryptoAddressesPage.addAddressButton.click();
    let rowCount: number;
    MyCryptoAddressesPage.tableRowCount.then((c) => (rowCount = c));
    AddWalletModal.selectAssetFromSelectorAndConfirm('BTC');
    // eslint-disable-next-line cypress/no-unnecessary-waiting
    cy.wait(3000);
    MyCryptoAddressesPage.tableRowCount.then((c) => expect(c).eq(rowCount + 1));
    MyCryptoAddressesPage.lastTableRowAmountColumn.then((c) => expect(+c.text()).to.eq(0));
  });

I have also attempted intercepting everything and wait for it, same issues , fails few times then work for two times then fails again, dont get it, can that be cookie session related?

beforeEach(() => {
    cy.intercept('GET', '**/config').as('dataRequest');
    cy.intercept('GET', '**/6241b4c7-311a-46e8-a005-7678b866b292').as('ddataRequest');
    cy.visit(Route.LogIn);
    cy.wait('@dataRequest');
    cy.wait('@ddataRequest');
    LogInPage.logIn(user.email, user.password);
  });