“SendMessage cannot be called during Awake“ warnings appear when loading a scene with “LoadSceneAsync“ if using UI Toolkit in the scene

How to reproduce:
1. Open the user’s attached “ToolkitTest.zip” project
2. Enter Play Mode
3. Press the “LOAD NEXT SCENE” button
4. Observe the Console window

Expected result: no warnings
Actual result: few “SendMessage cannot be called during Awake, CheckConsistency, or OnValidate“ warnings appear

Reproducible with: 2022.2.0a10, 2022.2.21f1, 2022.3.14f1, 2023.2.3f1, 2023.3.0a17
Not reproducible with: 2021.3.33f1, 2022.2.0a9

Reproduced on: macOS 13.5.2 (Intel)
Not reproducible on: No other environment tested