PDF files not previewing in Microsoft Purview Content Explorer under Data Loss Prevention

Hello,

We are experiencing an issue where no PDF files can be previewed in Microsoft Purview's Content Explorer, specifically under the Data Loss Prevention (DLP) section.

Here are the conditions:

The PDF files are not encrypted

They are text-based, not scanned images

The appropriate roles (Content Explorer List Viewer and Content Explorer Content Viewer) are assigned

We are using Microsoft Edge as the browser

The issue affects all PDF files, regardless of content or location (e.g., stored in users' OneDrive)

Previously, PDF preview worked fine in the DLP Content Explorer. However, now we consistently receive the message:

“This item does not support context summary and feedback.”

We are aware of an ongoing incident (ID: MP1085955) related to event-based retention in Data Lifecycle Management and Records Management. Could this incident be affecting PDF preview functionality in DLP Content Explorer as well?

Any insights or confirmation would be greatly appreciated.

Thank you!