Same version here, but Win 25H2 brought some new problems – driver resets with 2-3 sec black screen while using Web browser or Photos app. Looks like a well known problem.
I still have problems (using RTX 4070 on Win 26200.7840) with AI masks sometimes. They look like some timing issues with memory allocation involved – sometimes GPU native memory usage goes up to 11.6GB (out of 12GB). If ‘Shared GPU Memory’ usage goes beyond 5GB, I usually have to restart PL9.5 to get standard export times. The “Shared GPU memory” is managed by Windows, so it looks like it’s a really complex problem involving Microsoft/NVIDIA (and DxO). I’ve predicted that it will be solved by spring 2026 but my hopes are expiring. After the fix provided by NVIDIA few months ago and some undocumented Windows changes, I’m able to get my work with AI masks done, but it’s not comfortable. To summarize, with 591.74/25H2 there are still ocassional black screens and GPU memory leaks related to AI masks, but for non AI masks PL9.5 works stably.
It’s high time for DxO to provide some feedback from MS and NVIDIA, unless they are under NDA.