Hi,

If you use Office 365, you might've noticed that Microsoft started rolling out the "new experience" UI for the document libraries. It looks radically different from what you are used to, not like SharePoint, but more like OneDrive. The whole rendering mechanism for both list views and forms has been updated and streamlined, using modern, responsive UI that works great no matter what device you use.

Unfortunately, it does come with a price. At this point, the new UI is completely uncustomizable, meaning that any special column types or forms extensions that you might use, such as Ultimate Forms tabs or columns, cannot be rendered on the new UI.

If it's important for you to preserve the rich form experience of Ultimate Forms, make sure to switch your document libraries back to "classic experience" for as long as customization are not supported (Microsoft promises more support for customizations in the future). You can do it in Advanced settings of a particular document library or, if you are an administrator, tenant-wide, using PowerShell script.

For more information on how to change the UI, read the following article:
https://support.office.com/en-us/article/Switch-the-default-for-document-libraries-from-new-or-classic-66dac24b-4177-4775-bf50-3d267318caa9?ui=en-US&rs=en-US&ad=US