Reproduction steps:
1. Open the “ImporterMultiSelectCrash“ project
2. Open the “Images” folder
3. Select the “test1.png“ asset, and in Inspector set the Importer to “Test1Importer”
4. Select the “test2.png” asset, and in Inspector set the Importer to “Test2Importer”
5. Multi-select the “test1.png” and “test2.png” assets

Expected result: the Editor does not freeze
Actual result: the Editor freezes

Reproduced in: 2022.2.4f1, 2022.2.9f1, 2023.1.0b3, 2023.2.0a2
Not reproduced in: 2020.3.45f1, 2021.3.19f1, 2022.2.3f1 (“Creating editor inspector failed: input objects don't reference to the same script” warning instead)

Reproduced using: macOS 13.0.1 (Intel), macOS 13.2 (M1) (by user)

Note: after the freeze, opening the project is stuck at cycling between importing “Images/test1.png” and “Images/test2.png”