SSO doesnt work when incognito/iframe

@dan.woda React app built with “@auth0/auth0-react”: “1.2.0” and “@auth0/auth0-spa-js”: “1.13.5”,
no longer works in incognito in chrome.

The behaviour is quite troubling, since it seems to manifest in a way that a user can login and get to the ui, but once there, no XHR requests work due to the user not being authenticated in the Apollo client which gets the token from the Auth0Provider, the Auth0Provider in turn seems to think that the user is authenticated but not all functionality is supported.

We are using getTokenSilently() from the auth0Client and set it as header for the Apollo link, and the call to getTokenSilently() is returning nothing, but Auth0Provider says the user is authenticated.

Ultimately, the Apollo client reports an error from the backend that the token is missing in the request. And this only happens in incognito.