Photoshop file fails to appear in catalog.

I have found a possible Lightroom and Photoshop integration bug.

If Photoshop is already open before I start Lightroom, then I select a photo in Lightroom and choose Edit in Photoshop, the edited file is saved correctly to disk after saving in Photoshop, but it does not appear back in the Lightroom catalog.

If Photoshop is closed before I start Lightroom, everything works normally and the edited Photoshop file is added back to the Lightroom catalog after saving.

Lightroom Classic and Photoshop Sysinfo attached.

Adobe Photoshop Version: 27.9.1 
Lightroom Classic 15.5.1

Has anyone else experienced this?