No subject detected when using subject masking even tho subject clearly stands out from the photo

[kitsunestudios]

As the subject suggests, I have no success in masking subject in LrC. I tried this with many other photos I've taken before and results are all the same. 

However, when I tried opening the same photo in Photoshop, the subject can be selected properly. So now I wonder what could be the difference in setting between the two, if there's any. 

Help is greatly appreciated! 


Here's my system info if it helps:

Lightroom Classic version: 13.5.1 [ 202408271704-d15d09cd ]
License: Creative Cloud
Language setting: en-JP
Operating system: Mac OS 14
Version: 14.6.1 [23G93]
Application architecture: x64
Logical processor count: 12
Processor speed: 2.6GHz
SqLite Version: 3.36.0
Power Source: Plugged In, 80%
Built-in memory: 32,768.0 MB
Dedicated GPU memory used by Lightroom: 2,631.4MB / 4,080.0MB (64%)
Real memory available to Lightroom: 32,768.0 MB
Real memory used by Lightroom: 6,601.8 MB (20.1%)
Virtual memory used by Lightroom: 58,243.7 MB
Memory cache size: 73.1MB
Internal Camera Raw version: 16.5 [ 1954 ]
Maximum thread count used by Camera Raw: 5
Camera Raw SIMD optimization: SSE2,AVX,AVX2
Camera Raw virtual memory: 1224MB / 16383MB (7%)
Camera Raw real memory: 1298MB / 32768MB (3%)

Cache1:
Preview1- RAM:21.0MB, VRAM:0.0MB, IVN08922.ARW
Preview2- RAM:21.0MB, VRAM:0.0MB, IVN08928.ARW
Final3- RAM:347.0MB, VRAM:0.0MB, IVN08924.ARW
Final4- RAM:329.0MB, VRAM:0.0MB, IVN08923.ARW
Preview5- RAM:21.0MB, VRAM:0.0MB, IVN08929.ARW
Preview6- RAM:22.0MB, VRAM:0.0MB, IVN08926.ARW
Final7- RAM:329.0MB, VRAM:0.0MB, IVN08925.ARW
Preview8- RAM:21.0MB, VRAM:0.0MB, IVN08927.ARW
Preview9- RAM:22.0MB, VRAM:0.0MB, IVN08921.ARW
NT- RAM:1,133.0MB, VRAM:0.0MB, Combined:1,133.0MB

Cache2:
m:73.1MB, n:1,154.1MB

U-main: 122.0MB

Standard Preview Size: 2048 pixels
Displays: 1) 5120x2880

Graphics Processor Info:
Metal: AMD Radeon Pro 5300M
Init State: GPU for Image Processing supported by default
User Preference: GPU for Display Enabled
Enable HDR in Library: OFF

Application folder: /Applications/Adobe Lightroom Classic
Library Path: /Users/markivanmordeno/Pictures/Lightroom/Lightroom Catalog-v13-3.lrcat
Settings Folder: /Users/markivanmordeno/Library/Application Support/Adobe/Lightroom

Installed Plugins:
1) AdobeStock
2) Aperture/iPhoto Importer Plug-in
3) Flickr
4) HDR Efex Pro 2
5) Nikon Tether Plugin

Config.lua flags:

[Jao vdL]

Don't know if this is your problem, but due to a driver bug in the latest Mac OS releases, Lightroom has some major issues with AMD Radeon GPUs. It leads to artefacts in images and some of the AI masking not working correctly. 

[kitsunestudios]

Oh yeah, I realized when I turn the GPU setting to Auto, random artefacts are showing in my images so I have to turn it Off always. I hope this bug gets fixed soon while I go back to manually masking by brush lol. Thanks for your response.