Reproduction steps:
1. Open the attached “IN-98274“ project
2. In the Project window, select and open the “New Prefab” asset
3. In the Hierarchy window in Prefab Mode, click one “Text#” GameObject to select it
4. Hold Ctrl (Cmd on Mac) and click another “Text#” GameObject to add it to the selection

Expected result: The Editor updates instantly to show both TMP components selected
Actual result: The Editor freezes for 1-2 seconds before updating the selection

Reproducible with: 3.0.9, 3.2.0-pre.12 (2022.3.61f1), 6000.0.48f1, 6000.1.1f1, 6000.2.0a10

Reproducible environments: macOS 15.4.1
Not reproducible environments: No other environments tested

Notes:
- It reproduces when “Shift-clicking” to select multiple “Text#” GameObjects at once, but only if all selected GameObjects are TextMeshPro
- Adding more Inspector windows makes the freeze longer
- The Inspector windows have to be docked, but do not have to be visible