Denoise went from 6 seconds to 4min to complete. Why?

[why profile pic is a pig?]

I have RTX 3070. Couple weeks ago I was able to denoise images in 6 seconds. I think I updated during this time period. Otherwise everything is same as before pretty much. Anyone have any idea why does this happen? Was it the update? Task manager shows near 100% utilization for GPU. Nothing GPU intensive running on background.

[JohanElzenga]

Check that you are using the latest drivers for your GPU. The update will have made Lightroom more susceptible to outdated drivers.

[John R Ellis]

Please do the LR menu command Help > System Info and copy/paste the entire contents here so we can see exactly which versions of hardware and software LR thinks you're running and important LR options that are set.