Reproduction steps:
1. Open the repro scene.
2. Select the "dummy" object from hierarchy window.
3. From the inspector click on the small circle to open the Asset Browser window.
4. Click several times to select different materials from Asset Browser windows.

Problem: adding or removing label breaks the Asset Selector.
Expected result: After we add LabelField we should still be able to select material.
Actual result: When LabelField is added , we can't select the material(it freezes on the material we have selected the moment when label appeared).

Tested on 5.1.5f1, 5.2.3p3, 5.3.3p3, 5.3.4f1, 5.3.5p8, 5.3.5f1, 5.4.0b22, 5.4.0b25, 5.5.0a3.