Using Denoise AI for batch processing in Camera Raw: Uses GPU for a few images then stops

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I'm using the denoising in the "enhance" feature in Camera Raw and the process uses my GPU for the first few images then stops using GPU.  The processing slows down significantly at the point where it stops using GPU.  I can see the GPU use in the performancem monitor start out high for a few images then it goes to zero with an occasional spike.  I have the latest version of Camera Raw (16.3.1).  My GPU is an RTX 4090 and CPU is an i9 14900k running Win 11.

Does anyone know how to fix this issue?

Thanks