Photoshop freezes when trying to export to edited nef files from lightroom classic latest version of both to layers.

**Summary**
In Lightroom Classic, "Edit In > Open as Layers in Photoshop" with two edited Nikon NEF files makes the whole system unresponsive for a long time. The same two unedited NEFs open as layers normally. Exporting the edited files as 16-bit TIFF from Lightroom and using Photoshop's "Load Files into Stack" works fine, so the edits themselves render correctly. The problem appears to be in the Open as Layers handoff.

**Steps to reproduce**
1. Select two edited NEFs (high ISO, 64000) with [list edits, e.g. Denoise / AI masks / Dehaze +57 / Clarity +55].
2. Photo > Edit In > Open as Layers in Photoshop.
3. The system freezes. Processor use stays under 10% and memory around 80% of 32 GB.

**Expected:** Photoshop opens a two-layer document, with a progress indicator while Lightroom renders.
**Actual:** The whole PC becomes unresponsive, with no progress indicator and no way to cancel.

**System**
- Windows 11 25H2 (build 26200)
- AMD Ryzen (3D V-Cache), 32 GB DDR5-5600
- AMD Radeon RX 7900 XTX 24 GB, Adrenalin 26.9.1 (clean install, Factory Reset)
- NVMe SSD for OS, catalog, Camera Raw cache (50 GB) and scratch disk
- Lightroom Classic [version] / Photoshop 2026 [version]

**Already ruled out**
- Photoshop Beta (uninstalled) and regular Photoshop both affected
- Photoshop started with third-party plug-ins disabled: still freezes
- Graphics processor turned off in Lightroom and Photoshop: still freezes
- Source files copied from the HDD to the NVMe drive: still freezes
- Integrated Radeon graphics disabled; clean GPU driver reinstall
- Windows Defender scans clean

**Please address**
1. Open as Layers hanging or locking the system with heavily edited raw files, when Export to TIFF of the same files works.
2. No progress indicator and no way to cancel while Lightroom renders files for Photoshop.
3. A related issue: uninstalling Photoshop Beta removed Lightroom's link to Photoshop 2026, so Open as Layers, Merge to Panorama and HDR were greyed out until I reinstalled Photoshop 2026.

I can provide sample files and system info if helpful.