Photoshop 26.8: Color Settings Are Forcefully Overwritten by Other Adobe Apps

After updating to Photoshop 26.8 (released in June 2025), I’ve noticed that any changes to color settings in Photoshop are being overwritten every time the app becomes active. It appears that Photoshop is repeatedly syncing with the color settings of other Adobe apps, even after I've made manual adjustments.

Background behavior:

• Adobe apps like Photoshop, InDesign, Illustrator, and Bridge use a shared file called ACEConfigCache2.lst to manage color setting synchronization.
• Under normal behavior:
  • If you change color settings in Bridge and enable synchronization:
  • Bridge writes its color settings to ACEConfigCache2.lst
  • Other apps read the settings from that file the first time they become active
  • Each app also writes its own color settings back to the file afterward

The problem in Photoshop 26.8:

• Photoshop reads the settings from ACEConfigCache2.lst, but
• It fails to write back its own settings to the file
• As a result, every time Photoshop is reactivated, it loads color settings from another app (e.g., Bridge or Illustrator)
• This leads to repeated and unwanted overrides of Photoshop’s color settings

Current workaround:

• Use the same color settings across all Adobe apps
• Avoid manually changing color settings within Photoshop

At the moment, there's no other stable workaround.

System environment:

• macOS Sequoia (Apple Silicon Mac)
• It’s unclear whether this is related to macOS or specific to the Apple Silicon architecture
• I haven’t been able to test this on Windows yet

2025/06/21 Update: We’ve confirmed that this issue does not occur on Windows, suggesting it may be specific to macOS or Apple Silicon.

If anyone has observed similar behavior on Windows or other macOS environments, I’d appreciate hearing your experience.