Develop module preview freezes/corrupts after applying Denoise AI and syncing across high ISO photos

Description of Issue:
Lightroom Classic freezes the photo preview after using AI Denoise combined with Sync across a batch of high-ISO photos. Once the bug triggers, no slider adjustment updates the preview anymore - only the histogram reflects changes, not the actual image.

Lightroom Classic Version Number:
15.5

OS Version Number:
macOS 26.5.2

Camera Model:
Sony A1 II / A7R V / A7S III

Step-by-step Reproduction Instructions:

1. Import a batch of high-ISO photos, some already partially edited.
2. Select one photo and apply AI Denoise at approximately 30%.
3. Select all high-ISO photos in the batch and Sync settings from the denoised photo.
4. Navigate to the first photo in the batch (one that had edits applied prior to the denoise sync).
5. Attempt to change any slider on that photo.

The Expected Result:
The photo preview updates in real time to reflect the new slider values, as in any normal edit.

The Actual Result:
The photo preview is frozen and does not update regardless of slider changes. The histogram does register the adjustment, but the visible image does not change. This has happened repeatedly across sessions.

Video: