Component icon does not clear when Serialized field is changed to "None"

Reproduction steps:
1. Open the attached “Test Project” project
2. Select “SerializedFieldBug” in the Hierarchy window
3. Select “Serialized Field Bug (Script)” Component and change the “Serialized Transform” value to anything in the Scene
4. Change back the “Serialized Transform” value to “None”

Expected result: “None” value displays no icon
Actual result: “None” value displays the previous icon (Transform icon)

Reproducible with: 2022.2.0a9, 2022.2.2f1, 2023.1.0a25, 2023.2.0a2
Not reproducible with: 2020.3.44f1, 2021.3.16f1, 2022.2.0a8

Reproducible on: Windows 10