Reproduction steps:
1. Open the "Gigaya" project
2. Open Oasis Scenes (Gigaya > Scenes > Load Oasis Scenes)
3. Click "Open in Search" in the Hierarchy window
4. Toggle on Query Builder Mode
5. Add query blocks "Hierarchy" and "Mesh Filter"
6. While the search items are being enumerated, quickly try to add another query block

Expected result: The query block selector window should be concurrent with the current search context being executed and not freeze Unity
Actual result: Unity freezes

Reproducible with: 2022.1.0b13, 2022.2.0a8
Could not test with: 2019.4.37f1, 2020.3.32f1 (No Search window), 2021.2.17f1 (No Query Builder)