My page looks fine on my computer but blank on my phone
You open your page on your laptop and it is perfect. You open the same page on your phone and there is nothing there - maybe a footer, maybe a cookie banner, but none of your actual page. Nothing you changed recently explains it, and the page was fine when you built it.
The prompt
“My [page name] page looks fine on my computer but comes up blank on my phone. Check the page structure and fix it, then show me a preview.”
Signed in, Get my prompt fills in your site for you. Otherwise press Copy and fill in the [bracketed] parts. First time? Connect your AI to bernard once: Use your own AI (opens in a new tab).
This is almost always one missing closing tag, and it is quick to fix.
What is actually happening
When bernard moves a site across, it keeps two copies of every page: one laid out for big screens and one for phones. Your browser is shown whichever copy fits the screen it is on, and the other is hidden. You never notice, because you only ever see one of them.
The two copies are meant to sit side by side. If a tag in the computer copy is never closed, that copy keeps going and swallows the phone copy. Now the phone copy is inside the computer copy - so when your phone hides the computer copy, the phone copy goes with it, and there is nothing left to show.
Your computer still looks perfect, which is what makes this so easy to miss.
Nothing has been lost
Both copies of your page are still there, complete. One is simply trapped inside the other and cannot be displayed. Closing the tag releases it, and your page comes back exactly as it was. No content needs rewriting.
How to fix it
Ask Bernard, naming the page:
My blog post from 4 September looks fine on my computer but comes up blank on my phone. Check the page structure and fix it, then show me a preview.
Bernard reads the page the way a browser does, finds the copy that was left open, closes it, and shows you a preview. Check that preview on your phone before you approve it - that is the screen the problem was on.
How you will hear about it in future
Bernard now checks this every time it saves a page and every time it verifies one. If a page’s two copies are nested, it says so in the same reply, and it tells you whether that edit caused it or whether the page was already like that - so you are never sent looking for a change that was not the cause.
If you want to check a page yourself at any time, just ask:
Is my [page name] page structured correctly for phones?
Worth doing anyway
Whatever the cause, it is worth opening your own site on your phone every so often. Most visitors arrive on one, and it is the screen you look at least.
Questions people ask
- Why does my page look fine on a computer but blank on a phone?
- Your site keeps two copies of each moved page - one laid out for computers and one for phones - and shows whichever suits the screen. If a tag in the computer copy is left open, it swallows the phone copy, and the two get hidden together. Your phone then has nothing to show. It is a single punctuation-level mistake in the page, not lost content, and nothing has been deleted.
- Have I lost the content on that page?
- No. Both copies of the page are still there in full. One is trapped inside the other, so it cannot be displayed. Once the tag is closed, the phone copy appears again exactly as it was.
- How do I know if a page has this problem?
- Ask Bernard to check the page. It reads the page the way a browser does and tells you whether the two copies are sitting side by side or one inside the other. You can also just open the page on your phone - if the page body is empty while your computer shows it normally, this is the usual cause.
- Why did nobody tell me sooner?
- Until September 2026, nothing checked for it, so a page could stay broken while you kept editing and publishing it. Bernard now checks every time it saves a page and every time it verifies one, and says so straight away.
- Will this happen again if I keep editing the page?
- Editing normally does not cause it. It comes from hand-written HTML with a missing closing tag. If a save ever does introduce it, Bernard tells you in the same reply, and says whether that edit caused it or the page was already like that.
- Will Bernard change my live page without asking?
- No. The fix is made on a private draft and nothing reaches your live site until you approve it. Open the preview on your phone before you approve - that is the screen the problem was on, so it is the one worth checking.