The later versions of Bridge keeps regenerating thumbnails every time the Bridge app window gets into focus. It has been like this for a while (used to be OK, not quite sure when this error was introduced). I have been hoping this would be fixed, but no luck so far.

Here is a repeatable sequence that will show this problem:

1) Select a smart collection in Bridge (workspace Filmstrip used)
In my case the collection targets a folder with 13 sub-folders (looking for files with one or more stars) holding the following file types:

.acr: 6 files
.CR2: 6274 files
.dng: 400 files
.psd: 2415 files
.xmp: 6274 files

TOTAL: 15369 files

2) Wait until things stabilize (no more activity generated by Bridge)

3) Place any (other) program window on top of the Bridge window

4) Observe that Bridge is still quiet

5) Remove (like minimize) the window now on top so that the Bridge window is fully exposed

6) Observe that Bridge now restarts generating thumbnails

7) The generation goes on for a while and consumes considerable (computer) resources (slows any other operations down)

8) When Bridge has finished, repeat: thumbnails are generated again ...

My workflow involves going back between Bridge and Photoshop. While Bridge is working (again) on the thumbnails, my machine gets quite busy, saturating all 16 cores and 32 threads (100% CPU utilization), and it gets somewhat laggy. This happens of course quite frequently.

The Bridge cache is located on my fastest disk, CORSAIR SSD Force MP600 Gen4 PCIex4 NVMe M.2. All the files mentioned are located on my SAMSUNG SSD MZ7L33T8HBNA-00A07 SATA disk.

It is worth noting that it seems to be only the thumbnails for the .CR2 raw files (from Canon EOS 5D Mark III) that are being regenerated. See the linked screen recording for details:

https://www.dropbox.com/scl/fi/mi1sk1x52i4sv5lsp6g0a/Recording-2024-04-18-131607.mp4?rlkey=ilhn574lsvrcox6v62f5fuie4&dl=0

Before running the tests described above I did the following:

1) Deleted the Bridge cache (Bridge then automatically builds a new empty cache when started).
2) Cleared Bridge preferences (Ctrl+Alt+Shift on startup)
3) Uninstall Bridge
4) Install the latest version of Bridge (14.0.4.222)

System details:

Adobe Bridge Version: 14.0.4.222

Windows: Windows 11 Pro 64-bit
Version: 23H2 (Version 10.0.22631.3447)
OS build: 22631.3447

NVIDIA GeForce RTX 2060
NVIDIA Studio Driver, version: 552.22 Release date: 04/16/2024

CPU: AMD Ryzen 9 5950X
RAM: 64 GB

System Disk:
CORSAIR SSD Force MP600 Gen4 PCIex4 NVMe M.2 1TB
Data Disks:
Samsung SSD 860 PRO SATA 4TB x2
SAMSUNG SSD MZ7L33T8HBNA-00A07 SATA 4TB x1