Widgets showing on preview but not on live site

Hi,

I recently added a javascript code block to my website which appears fine during page preview and when editing the various blocks. However, the blocks don't appear when I navigate to the site via links or the URL. Is there a time delay on those widgets appearing on the website? 

Thanks

This could be a CORS, security or Ajax issue. It will really help us if you include a working link to the page in your question. It allows us to see the issue first-hand. If your site isn't live yet, please set a site password and tell us what it is, so that we can view it.