Live samples in global color picker don't retain their saved position

Is there an existing issue for this?

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

Describe the bug

Loading live samples into the active color picker sometimes removes them from their original position into a different live sample's position.

I'm not sure if I'm misunderstanding how to use live samples in color picker, but this seems like a bug to me.

Steps to reproduce

1. Open global color picker
2. Check "display samples on image/vectorscope" to see the bug easily
3. Save at least 2 live samples using global color picker (doesn't matter if point/area or locked/unlocked)
4. Right-click on any live sample to load it into active color picker
5. Right-click on any live sample again (whether the same one from the previous step, or a different one)
6. Observe that one of the live samples moves to the position of another live sample

Expected behavior

darktable should not change the position of a live sample when loading different samples into the active color picker

Logfile | Screenshot | Screencast

darktable-log.txt

Commit

No response

Where did you obtain darktable from?

darktable.org / GitHub release

darktable version

5.4.1

What OS are you using?

Windows

What is the version of your OS?

Windows 11 Pro 26200.7840

Describe your system

No response

Are you using OpenCL GPU in darktable?

Yes

If yes, what is the GPU card and driver?

NVIDIA GeForce RTX 3080 Ti | Memory 12GB | Driver version 595.71

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

Can you reproduce with a RAW or JPEG or both?
Both

Start by reproducing the issue through the global color picker using two live samples, with “display samples on image/vectorscope” enabled. Trace the live-sample loading path and verify that repeatedly loading samples leaves each saved sample at its original position; add or run a regression test if the relevant test location is identified.