Denoise filter applied but not visible on batch of photos

Applying Denoise in version v14.5.1 on multiple photos takes a long time (for 250 photos, it took 1 hour). But after the process is completed, the filter effect is not visible on the photos. You have to refresh the filter for each single photo; otherwise, it shows as applied but has no effect. This happens both when synchronizing all photos and when shifting the slider to change the synchronized value. This makes it unusable.

Platform: mac os Sequoia 15.6.1
Version: Lightroom Classic v14.5.1

Steps to reproduce:
1. Select multiple photos (batch)
2. Apply Denoise filter to the batch
3. Check the photos for the Denoise effect

Expected result: All photos should be processed with the Denoise effect visible

Actual result: The Denoise effect is missing unless manually refreshed for each individual photo