Reproduction steps:
1. Create a new project
2. Drag and drop any Asset file into the Editor
3. Observe the Console
Actual result: “ReleaseButton expects buttonId >= 0
UnityEngine.GUIUtility:ProcessEvent (UnityEngine.EntityId,intptr,bool&) (at /home/bokken/build/output/unity/unity/Modules/IMGUI/GUIUtility.cs:224)” error is thrown
Expected result: No errors or warnings are thrown
Reproducible with: 6000.0.0f1, 6000.0.75f1, 6000.3.16f1, 6000.4.8f1, 6000.5.0b9, 6000.6.0a5
Reproduced on: Ubuntu 24.04
Not reproduced with: Windows 11, macOS Tahoe 26.4 (M4)