Reproduction steps:
1. Download and open the attached project 'clicks.zip'
2. In the Project window, open Test.shadergraph
3. Open Create Node menu
4. Try to create any Node

Expected result: Clicks are registered in Create Node menu and Nodes are being created
Actual result: Clicks aren't being registered in Create Node menu and Nodes are not being created

Reproducible with: 8.1.0 (2020.2.0a12), 10.3.1 (2021.1.0b6, 2020.2.3f1), 11.0.0 (2021.2.0a3)
Not reproducible with: 7.5.3 (2019.4.20f1), 11.0.0 (2021.2.0a4)
Couldn't test with: 8.0.1 (2020.2.0a1) (Couldn't create shadergraph)

Notes:
- Right-Clicking the window fixes the issue
- The issue might be specific to macOS 11.1 Big Sur
- Shader Graph package versions below 8.1.0 have different Create Node menu

Tested with:
- MacBook Pro 2019 16", macOS 11.1 Big Sur (Reproducible)
- MacBook Pro 2019 16", macOS 11.1 Big Sur (Reproducible)
- Windows 10 Enterprise, Desktop Computer (Intel i9-10940X, NVIDIA RTX 2070 SUPER) (Reproducible)
- Mac Mini M1, macOS 11.0 (Not Reproducible)
- Dell XPS 15 9570, Windows 10 (Not Reproducible)