Lightroom adjustments look fine but export looks very dark in bridge only on some images.

Question

Using lightroom classic 12.4 and camera ras 15.4

I have been using photoshop since 1993 and lightroom since it came out. I have never encountered this issue. I process images as I normally do and export them. When they show up in lightroom they show up as very dark or oddly dark like a linear gradient has been applied. So far I have exported 772 and 116 have been wrong. I am a professional full time photographer and have used my equipment daily for years. Images came from 2 Sony A9 cameras. I will attach a video showing what I am seeing.

TheDigitalDog · Answer

First, try disabling GPU in the preferences (Performance). Any better? 
If not, recalibrate and build a new ICC display profile; the old one might be corrupted. If you are using software/hardware for this task, be sure the software is set to build a matrix, not LUT profile, Version 2, not Version 4 profile. 
If turning OFF the GPU works, it's a GPU bug, and you need to contact the manufacturer or find out if there's an updated driver for it. This is why disabling GPU is an option as more and more functionality moves to the GPU in newer versions of many Adobe products. Disable third-party graphics accelerators. Third-party GPU overclocking utilities and haxies aren't supported.
 Also see: https://helpx.adobe.com/lightroom-classic/kb/troubleshoot-gpu.html

If the GPU and display profile isn't causing the problem, see:
https://helpx.adobe.com/lightroom-classic/kb/lightroom-gives-error-preview-cache.html

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