I have never had this issue in previous versions of Lightroom (or Photoshop, if it's a Photoshop problem), but whenever I open an image (jpg, psd, tiff) from Lightroom into Photoshop and do some editing there, when I get back to Lightroom the [+/-] icon appear on the image ("Photo has development adjustments") and on the Quick develop panel, next to "Saved preset", appears "Custom".
As I said, I have never seen this behaviour before.
Thank you for your consideration.
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Thread moved to Lightroom Classic 'Bugs' forum