So I've successfully done all the updates mentioned, and attempted my first run with this process. It did NOT work.
36,191 images in my LR at the point of 'Edit in Photoshop' - PS launches, image appears, I make adjustements, duplicate a layer or two, close the file (and obviously agree to save the changes), image closes, and when I go back to LR (and wait a few mins to be sure), nothing has updated with the modified image.
I still have 36,191 images in my library.
So, these updates have not made any difference to me.
Updates to the Adobe Photography Products were released on June 13. The update contains a fix for this issue.Please download and the latest version of your application via the Adobe Creative Cloud Application or your respective device app store.
If you do not see the update (Mac and Win) you can refresh your Creative Cloud App with the keyboard shortcut [Ctrl/Cmd]+[Alt/Opt]+[ R ].
Note: App store availability can take several days for the update to appear and be available.