Shadergraph Category folder doesn't expand/collapse when using arrow keys to navigate

Steps to reproduce:

1. Create and open a new project
2. Create and open a shadergraph
3. Add a category and a few other variables in the Blackboard
4. Click on the triangle to expand/collapse the category
5. Press the left/right arrow keys to collapse/expand the category and observe

Actual results: Only the triangle changes direction, but the category doesn't expand/collapse

Expected results: The triangle changes direction, and the category expands/collapses

Reproducible with versions: 6000.0.0f1, 6000.0.77f1, 6000.3.18f1, 6000.4.12f1, 6000.5.0f1, 6000.6.0a7

Tested on (OS): Windows 11 Pro (25H2)