Updated today to new release of Camera Raw and GPU started failing

Thanks for the link, I will try the ‘downgrade’ and hopefully it will fix the problem. It does appear that the ‘graphics processor out of memory error’ is a new problem introduced by Camera Raw 18.3. I have done a bit more investigation of the circumstances of the problem, here is what I observed:

• I am using Camera Raw 18.3.0.2528 with either Photoshop 2026 27.6.0.11 or Photoshop Beta 27.7.0.3521, running on Windows 11 Pro 25H2. The problem occurs whichever version of Photoshop I am using.
• Hardware is Intel Ultra 7 265K with 192Gb RAM and Asus GeForce RTX 5070Ti with 16Gb RAM - so GPU memory should not be a problem.
• I am editing a single Raw Image (a 45Mp NEF file from a Nikon Z8).
• When I use ‘Select Subject’ followed by  some operation such as increasing Sharpness, GPU memory immediately jumps to almost 16Gb (100%) and GPU processor usage remains high for many minutes. If I attempt another masking operation such as ‘Duplicate and Invert Mask’ I immediately get ‘graphics processor out-of-memory error’.
• After 5-10 minutes the GPU processor usage drops and GPU  memory usage drops to almost 8Gb (50%). I am then able to perform another masking operation, such as ‘Duplicate and Invert Mask’. The high GPU processor and memory usage problem then reoccurs.
• This is completely new behaviour introduced by one of the latest Photoshop Updates (I can’t pinpoint exactly which one) - before that everything worked fine.