How to reproduce:
1. Create a new Unity project
2. In the Inspector, select any GameObject
3. In the Inspector, click the three-dot menu and check the "UI Toolkit Live Reload"
4. Uncheck the "UI Toolkit Live Reload"
5. Observe the Console

Expected results: No errors are thrown into the Console
Actual results: "EndLayoutGroup: BeginLayoutGroup must be called first." is spawned into the Console

Reproducible with: 6000.0.43f1, 6000.1.0b11, 6000.2.0a7

Reproducible on: macOS Sequoia 15.3 (M1)
Not reproducible on: No other environment tested

Full error:
EndLayoutGroup: BeginLayoutGroup must be called first.
UnityEngine.GUIUtility:ProcessEvent (int,intptr,bool&) (at /Users/bokken/build/output/unity/unity/Modules/IMGUI/GUIUtility.cs:219)