Advanced view disappears when user clicks "fold" in some cases

[Dinika]

The issue was reported by @NicoRicardi

If we go to this resource, the "Adanced view" tab either does not show the json or, if you click on "Fold" toggle button, then the json disappears.

I noticed that the issue appears specially if you recently signed in (for example, open this link in an incognito window in browser, after redirection from login page the "Advanced view" tab of this resource misbehaves).
It starts working as expected if you either refresh the tab a few times or go to fusion home page, open another resource's advanced view, then come back to the resource tagged above and then open the advanced view.