P: Rectangle appears on images after editing in Photoshop and returning to Lightroom Classic

[iainmclean]

Whenever I export from Lightroom Classic and do some editing in Photoshop and return to Lightroom Classic on saving, there is always a rectangle at a different light level than the rest of the image.  This is corruption, I don't see this rectangle at all in Photoshop and if I reopen the file in photoshop it is not there, just in Lightroom.

It is sooooooooo annoying.

You can see it in this attached image, it happens almost every time I edit in Photoshop and return to Lightroom.  I have more examples.

Iain

Mac OS 10.15.3, iMac 27" 2018, Benq SW321C Photographer Monitor. Adobe Photoshop 21.1.1 Lightroom Classic 9.2


Same image in Photoshop:

[iainmclean]

So, why is that when Legacy Compositing is ON I still have the bug?

[johnrellis]

If you upload a sample raw that triggers the problem, then Adobe will be able to reproduce it and determine the precise cause. As it stands now, the only known way to reproduce the problem is to leave Preferences > Performance > Legacy Compositing off.