How to reproduce:
1. Open the user-submitted project
2. Open the Shader Graph "UnlitShaderGraph" (Assets/UnlitShaderGraph.shadergraph)
3. Open the "Create Node" menu (Right-click > Create Node)
4. Press the Down Arrow Key

Expected result: Navigation in the "Create Node" menu works with arrow keys
Actual result: Navigation in the "Create Node" menu doesn't with arrow keys

Reproducible with: 12.0.0 (2021.2.0b9, 2021.2.0b14, 2022.1.0a10)
Not reproducible with: 7.7.1 (2019.4.31f1), 10.7.0 (2020.3.19f1), 11.0.0 (2021.1.23f1), 12.0.0 (2021.2.0b8)

Notes:
1. Keyboard key navigation works after clicking on the "Create Node" menu
2. Searching in the menu and using the keyboard to navigate sometimes results in Console errors

Error in the Console window:
Events cannot be dispatched more than once.
UnityEngine.GUIUtility:ProcessEvent (int,intptr,bool&) (at /Users/bokken/buildslave/unity/build/Modules/IMGUI/GUIUtility.cs:189)