Duplicate values when using draggable fields feature in a drop-down list

[Xefiron]

DSpace version: 7.4 - 7.6
Browser: Microsoft Edge v119.0.2151.72; Google Chrome v119.0.6045.160; Mozilla Firefox v119.0.1
Environment: Local repository and DSpace 7 demo
Bug description: When you select an option from a drop-down list with at least two options and drag it over another, and modify any of them, both adopt the same value.

Steps to reproduce the behavior:

1. Log-in and start a new item.
2. Go to an dropdown field. Ex. dc.type and add two elements.
3. Dragg one of them and select another option.
4. Both elements duplicate their values.

Expected behavior
When dragging an item from a drop-down list, each field should be independent in its value.

[tdonohue]

Reproducible on demo.dspace.org. Here's the steps I took:

1. Start a new Submission
2. Scroll directly to the "Type" field (which is a dropdown). Select a value (doesn't matter which one)
3. Click "+Add More", select a different value in the new "Type" dropdown.
4. Hover mouse over the drag & drop bar (to the left of the field). Reorder the two values so that the second value is now listed first.
5. Finally, change either dropdown to a new value. They both will change. It's no longer possible to have two different values unless you delete one and re-add it.

Moving this to the 7.6.x board in search of a volunteer.