Ran into this issue for the first time this week, although I've had the same workflow for years.
Edit RAW images in Lightroom Classic > select photo and "Edit in Photoshop" > make edits as needed > Export from Photoshop as JPG or PNG
Now as soon as I export the photo from Photoshop, it will immediately affect the photo in the Lightroom catalog. It removes the rating (1-5 stars) and removes ALL edit settings, but the +/- icon on the bottom right of the thumbnail remains as if there are changes made. I can go back on the photo, look at the edit history, select the most recent change and the photo will go back to the edited version that I moved into Photoshop with, but this shouldn't be happening in the first place. This also happens when I save the file from Photoshop (to my computer or the cloud).
I've checked export settings on both softwares and can't find anything.
Using MacBook Pro 2020 M1 MacOS Tahoe 26.1
Photoshop 27.1
Lightroom Classic 15.0.1