DisableThirdPartyStoragePartitioning Trial Test isn't working

[TimWilliams-a]

Hey Everyone,
I am trying to the DisableThirdPartyStoragePartitioning for a third-party iframe with 0 success.
I did everything in the right order.
I have the following HTML Page:
`

<script src="https://www.example.com/test.js"></script> aaa `

Which rendered as an iframe with test.js content as:
`const TOKEN = 'TOKEN';

const otMeta = document.createElement('meta');
otMeta.httpEquiv = 'origin-trial';
otMeta.content = TOKEN;
document.head.append(otMeta);
console.log(localStorage);
localStorage.test=1;
console.log(localStorage)
`

When I open the Chrome dev tools on the Application I can see that everything is working

But when I am running the test on two different top TLD's I get two different localStorages which means that the test is failing and I can't understand why as everything is in green.