Metadata often not sync in an image group

Is there an existing issue for this?

• I checked and did not find my issue in the already reported ones

Describe the bug

When editing description or notes on grouped images, I noticed that often, when coming back to the group, the data seems not in sync across the pics of the group, leaving the <leave unchanged> comment.

Steps to reproduce

1. edit notes with some text on a group of images
2. click on another pic
3. click back on the group of step 1 (not systematic)

Expected behavior

propagate metadata across all images within the group

Logfile | Screenshot | Screencast

No response

Commit

No response

Where did you obtain darktable from?

darktable.org / GitHub release

darktable version

5.4.1

What OS are you using?

Linux

What is the version of your OS?

NixOS

Describe your system

No response

Are you using OpenCL GPU in darktable?

None

If yes, what is the GPU card and driver?

No response

Please provide additional context if applicable. You can attach files too, but might need to rename to .txt or .zip

No response

Start by reproducing the grouped-image metadata workflow described in the issue on darktable 5.4.1 under Linux/NixOS, focusing on editing notes, switching images, and returning to the group. Trace the grouped-image metadata handling to determine why the data can remain unsynchronized. Done means edited descriptions or notes consistently propagate across all images in the group without leaving the state.