Previews not loading?

Hi all - i have been having an issue lately where I am working in one tab to build my webapp and in the other tap using the platform to view & test out changes.

Normally when saving a change, the preview platform automatically refreshes and stuff.

But lately it is completely not working and the page loads the preview as empty & no content.
No errors or DOM elements load. Just an empty next.js page.

Note this doesn’t always happen - if I go away & come back it sometimes fixed.
It’s also not cookie related either.

Anyone else experiencing this issue?

Does it do the same on Incognito or private browsing? I had the same issue, switched to incognito and it worked.