ScriptableSingleton value change isn't detected in Unity when it's modified via text editor

How to reproduce:
1. Open the attached “TempTest.zip“ project
2. Open the “ExampleScriptableSingleton.dat“ file with a text editor (TempTest/ProjectSettings)
3. Change the “currentNumber“ value from 0 to 1
4. Save made changes
5. In the Unity Editor, log the “Current Number“ (BugReport > Log & Save Current Number)

Expected result: Logged “Current Number” is 1
Actual result: Logged “Current Number” is 0

Reproducible with: 2021.3.32f1, 2022.3.14f1, 2023.2.2f1, 2023.3.0a16

Reproducible on: macOS 14.0 Sonoma (Intel)
Not reproducible on: No other environment tested

Note: ScriptableSingleton changes are detected if the Editor is restarted or if everything is reimported (by right-clicking in the Assets folder and selecting “Reimport All“)