Netlify gurus
Our Gatsby blogging engine has been running for a year without issues. We now added code to implement meta refresh or unfurl and this seems to work very nicely in the Netlify preview but alas not in production on the custom domain as shown 
.
Are there any suggestions where we might look to find this error.
Thanks for any tips
Eric
Hi @ericmsmythe,
I don’t see any meta refresh on either of those URLs. However, if you tell us what you’re trying to achieve, we might have some suggestions.
@hrishikesh You beat me by seconds.
Haha, sorry didn’t see anyone typing so jumped in.
Thank you @hrishikesh for asking.
I am pasting an image in here that I hope will show the difference in the behaviour of the two URL’s viz preview and production
I am referring of course to the page preview when posting to a social media site or into a messenger.
Its puzzling how this works fine in the one case and not in the other.
Thanks for any help 
Oh now I see what you meant. It’s not meta refresh, but og preview. Also, this isn’t the correct place to debug OG tags. Check the links here:
That’s supposed to give you more accurate and correct information as to why it’s (not) working. As far as I can see, both the pages are loading a correct preview:
Preview:
Production:
So we can’t comment on why it’s not working in a particular application.
Super @hrishikesh
Following your clue, I tested on https://cards-dev.twitter.com/validator
And the custom domain did not return a card, no data and the preview did return an ideal preview.
We do have some issues, but I was wondering if there is some reason that both Telegram Messenger and Twitter card validator show that the custom domain build is faulty.
Also the google validator times out on the neetlify site, I guess we have to upgrade for more bw 
Thanks again for the support
Best wishes
Eric
My apologies if I am harping on the question, but from a purely netlify domain perspective, should the html not be idential. Here is a dif fof the headers that shows differences. The production should be like the preview but it is not.
Many thanks again
Hi @ericmsmythe,
Testing with Twitter’s card validator returns ERROR: Required meta tag missing (twitter:text:title) e.g. <meta name="twitter:title" content="This is a really awesome page!">
The og:title on both the URLs is empty <meta data-react-helmet="true" property="og:title" content="">
Here are two OG/Twitter tag generators if you need/want to create a sample set Open Graph Generator | Web Code Tools / https://webcode.tools/generators/twitter-card and Open Graph Generator / Twitter Card Generator
