Edit in Photoshop issue with images being saved back to Lightroom

I'm also can't reproduce this issue on my machine. However, I work with Windows.

In a first step try to reset the preferences of Lightroom Classic:  How to reset Lightroom Classic preferences (adobe.com)

It's recommended to backup your preferences before you reset the preferences to the default settings: 

https://helpx.adobe.com/lightroom-classic/kb/preference-file-and-other-file-locations.html

If this doesn't help try to uninstall Photoshop by using the Adobe Creative Cloud Application. When asked, keep preferences! After this reinstall Photoshop again.

If this doesn't help the nest step is to reinstall both apps Lightroom and Photoshop. Please follow the steps below:

1. Open the Adobe Creative Cloud Desktop Client and uninstall both Photoshop and Lightroom Classic. When asked, keep preferences! 

2. Install Photoshop first and then Lightroom Classic. The right order is very important here!

If this doesn't help try the reinstallation with removing the preferences also.

I have the same issue as you do. I can't seem to be able to add it to a collection either.

I can't reproduce your issue on my Mac. The Photoshop edited image always appears in the collection that I'd selected the image in. Steps that I used:

1. Selected image in collection

2. Used Cmd+E to send photo to Photoshop 27.0.0 (release version from late October 2025)

3. Edited image in Photoshop

4. Used Save (i.e. Cmd+S) to save image

5. Saved image appeared in Collection from step 1 above

If your procedure differs, then please specify where we differ.