How to reproduce:
1. Open the “My project(99).zip“ project
2. Open the “Input System Package” settings in the Project Settings
3. Add a new Action Property to a random Action in the “Player” Action Map
4. Enter Play Mode
5. Bind any key to the Action Property
6. Exit Play Mode
7. Observe the Console window

Expected results: No errors are thrown
Actual results: NullRefferenceException errors are thrown (“NullReferenceException: Object reference not set to an instance of an object“)

Reproducible in: 1.8.0-pre.2 (2022.3.18f1, 2023.2.7f1, 2023.3.0b4)
Could not test in: 1.7.0, 1.8.0-pre.1 (2021.3.34f1, 2022.3.18f1, 2023.2.7f1, 2023.3.0b4), 1.8.0-pre.2 (2021.3.34f1) (different Project Settings layout which does not support key binds)

Reproduced on: Windows 11 Pro
Not reproduced on: No other environment tested

Notes:
- After trying to reproduce the problem on the 2021.3.34f1 Editor version, in all other Editor versions NullReferenceException errors were thrown every second time the Project Settings window was unfocused or the “Path” Dropdown menu was selected (Only after testing the 2021.3.34f1 Editor version)
- The NullExceptionErrors do not impact the usability of the Editor