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Fix SharePoint Vertical Column Not Moving on Smaller Screens
Question details
The SharePoint communication page vertical column does not move below the main content on smaller screens as expected.
- Product
- Microsoft SharePoint
- Device & OS
- not provided
- Scenario
- Viewing a specifically configured SharePoint communication page on a device with a smaller screen or a minimized browser window.
- Observed behavior
- Instead of dropping below the main content, the right-hand section changes its layout while the vertical column remains visible, breaking the expected responsive design.
Verify that your SharePoint communication page is published and test the layout across different web browsers to ensure the issue is not caused by a localized browser caching error.
Submit a Service Request via Microsoft 365 Admin Center
Since this responsive layout behavior is a reproducible system bug, it requires a backend product fix from the Microsoft development team.
This specific behavior indicates a failure in SharePoint's native responsive CSS media queries. As end-users cannot edit the core structural code of modern SharePoint pages, escalating the issue to Microsoft for a system-level patch is necessary.
Take screenshots of the SharePoint communication page layout on a standard desktop view and compare it with the layout failure on the smaller screen view.
Reach out to your organization's Microsoft 365 Administrator and provide them with the page URL, the screenshots, and a description of the responsive failure.
Have the administrator log into the Microsoft 365 admin center (admin.microsoft.com) using their global admin or support admin credentials.
Navigate to 'Support' > 'Help & support' in the left-hand menu, describe the vertical column issue, and open a service request to have the development team collect logs and investigate the bug.
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Frequently Asked Questions
Can I use custom CSS to fix the SharePoint vertical column on mobile?
No. Modern SharePoint communication pages do not natively support injecting custom CSS or scripts via the Script Editor web part to alter structural page layouts. Doing so is unsupported and requires submitting a fix request to Microsoft.
Why does the vertical section work fine on desktop but break on small screens?
SharePoint uses responsive design rules (media queries) that are supposed to stack columns vertically when the screen width drops below a certain breakpoint. A bug in Microsoft's backend code for communication sites prevents this specific rule from executing properly for vertical columns.
Will republishing the SharePoint page fix the responsive layout issue?
Usually, no. Because the issue is tied to the underlying SharePoint responsive template behavior, simply editing and republishing the page will not resolve the structural bug. A backend patch from Microsoft 365 support is required.
