Reproduction steps:
1. Open the attached “BugRepro” project
2. Open the “Assets/Prefabs/night sky/constellations/carnival” folder
3. Select and open any prefab in that folder
4. In the Hierarchy window select “scene instantiator” child
5. In the Inspector window under the Instantiator (Script) component in the “Prefab to Instantiate” property select any asset

Expected result: Editor works with no freezes or lags
Actual result: Editor is lagging

Reproducible with: 2022.3.20f1 (user's reported version)

Reproducible on: Windows 11
Not reproducible on: No other environment tested

Note: The issue could not be reproduced locally