AssetImporterEditor is displayed in the Inspector window when selecting two files with an importer

How to reproduce:
1. Open the user’s attached “EditorSelectionError.zip” project
2. In the Project window, select “asd - Copy” and “asd” files
3. Observe the Inspector window

Expected result: “Multi-object editing not supported” message appears, and AssetImporterEditor inspector is not displayed
Actual result: “Multi-object editing not supported” message appears, and AssetImporterEditor inspector is displayed

Reproducible with: 2020.3.47f1, 2021.3.22f1, 2022.2.13f1, 2023.1.0b10, 2023.2.0a9

Reproduced on: macOS 13.2.1 (Intel) and Windows 11

Note: Not reproducible with ScriptableObject