The artifacts (lines) became visible in a part of the pictured that I repaired with the Remove - Generative AI tool. The artefact only appears if Denoise AI is applied as well.
Disabling one of them, makes the artefact dissapear.
No other edits applied.
Camera is Sony RX10iii, cRAW (.ARW file).
Lightroom version 15.4.1
macOS Tahoe 26.5.2
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Opening the catalog you shared, I don’t see the artifacts in my LR 15.4.1 / Mac OS 26.4.1. (See screenshot below.)
I tried deleting the .lrcat-data file that stores the result of the AI commands, forcing them to be re-evaluated, and the artifacts didn’t appear.
If in the test catalog you reset settings and then try to apply just Denoise and Remove, without the other steps shown in the History panel, does the problem reoccur? I’m wondering if it’s related to the particular sequence of commands shown in the History panel.
Unfortunately, if we can’t identify a way to reproduce this or share a catalog/photo showing the problem, Adobe isn’t likely to pay much attention.
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