Pattern Preview Tile Bounds Missing

[JLNArt]

Since the latest update (25.9.0), my Pattern Preview Tile Bounds are missing. I have tried Ctrl + H but it does nothing.

How do I get my bounding tile/ box back? Not having this guideline is making Pattern Preview almost impossible to use.

[c.pfaffenbichler]

Could you please post screenshots the pertinent Panels (Toolbar, Layers, Options Bar, …) visible? 

What are the View > Show > … settings?