Lightroom Reflection Removal Tool

Hello,

Reflection Removal (Remove > Distraction Removal > Reflections) produces a heavily corrupted image on my Intel iMac. The result is a saturated pink/magenta image with yellow, cyan and black artifacts. The image is unusable at any Amount value. A screenshot is attached.

System

• Lightroom Classic 15.6, and the same result in Camera Raw (Photoshop)
• iMac Retina 5K, 27-inch, 2019
• CPU: 3.7 GHz 6-core Intel Core i5
• GPU: AMD Radeon Pro 580X 8 GB
• RAM: 64 GB
• macOS Sequoia 15.8.1 (this Mac is not supported by macOS Tahoe)

Test file

• Raw DNG, Nikon Z camera, NIKKOR Z 24-70mm f/4 S at 70 mm, 1/80 s, f/4, ISO 640

What I tried, without any change in the result

• Setting Use Graphics Processor to Custom, with GPU for display only
• Setting Use Graphics Processor to Off in Lightroom Classic
• Disabling the GPU in Camera Raw preferences
• Restarting the applications
• Reapplying the effect from a clean state

Other AI features, like noise reduction, are not affected .

Expected result: Reflections removed from the image.

Actual result: Corrupted output as in the screenshot.

Since disabling the GPU in both applications does not change the output, it looks like the AI model runs through macOS Metal or Core ML on the AMD GPU regardless of the app setting. Similar reports have appeared in the community forums for Intel Macs with Radeon 500 and 5000-series GPUs. Could you either fix this or provide a CPU fallback for these machines?

Thank you.