The properties window expands to show the full filepath for a linked file in the layer stack and just covers the entire screen for me.

Photoshop Beta 28.0.1
MacOS 26.6.2

Similar issue with the OP

In Photoshop Beta 28.0.1, I have the Properties and Layers panels stacked vertically and docked on the right side of the screen.

When I select a linked Smart Object, the panel dock expands to an excessively wide width, apparently to accommodate the linked file’s source information in the Properties panel. This takes up a large portion of the workspace.

Steps to reproduce:

1. Stack the Properties and Layers panels vertically and dock them on the right side of the screen.
2. Open a document containing a linked Smart Object.
3. Select the linked Smart Object in the Layers panel.
4. Observe the width of the docked panels.

Expected result: The dock should retain its manually set width, with long source information wrapping or truncating within the Properties panel.

Actual result: The dock becomes much wider when the linked Smart Object’s source information is displayed.

This appears to affect linked Smart Objects only. I haven’t observed the same behaviour with embedded Smart Objects.