Custom Control Elements cannot be dragged into Hierarchy or Viewport after scrolling and expanding Element groups

Steps to reproduce:

1. Open any Project
2. Create a UI Document Asset in the Project Browser and open it
3. In the Library choose "Project"
4. Start adding some of the "Custom Controls" Elements to your Hierarchy by dragging
5. Add some, then scroll a bit down in the list, expand some Groups and then try to drag them to the Hierarchy
6. Now scroll up and then add Elements from groups that are further up in the list
7. Repeat steps 4-6 until issue reproduces

Actual results: Some of the Elements will not be draggable, even though a preview can still be seen in the Vieport and those Elements can be added by right-clicking and choosing "Add"

Expected results: No issues with Element

Reproducible with versions: 2023.1.0a8, 2023.1.20f1, 6000.0.42f1, 6000.1.0b10, 6000.2.0a6

Not reproducible with versions: 2022.3.60f1

Tested on (OS): Windows 11