Color picker in edit popup does not reflect selected color in the picker for some UML Diagram Elements

[egenerse]

Describe the bug

when a user edits the color of an element (either text or background) via the color picker in the edit popup, the selected color updates the element on the canvas correctly. However, the new color is not reflected in the color picker.

To Reproduce

1. Create a new object diagram
2. Add a new object element to canvas
3. Select it and edit addributes
4. Click the editing color button and select a new color and close the color selection
5. See the shown color has not changed

Expected behavior

Color picker should show the color of the attributes the same as the rendered one on the canvas

Screenshots

https://github.com/user-attachments/assets/ec5bc408-6d65-4b08-b2d3-45545a32c659

Environment

 - OS: Mac OS Sonoma 14.6.1
 - Browser chrome
 - Version 128.0.6613.84