Using UI Toolkit Default Inspectors results in performance degradation in the Inspector

Reproduction steps:

1. Open the user attached project
2. In the Assets folder press on “Hoge” asset
3. Observe the Inspector

Expected result: Content in the Inspector is displayed instantly
Actual result: Content in the Inspector is slowly appearing

Reproducible with: 2022.2.0b3, 2023.1.0a4
Could not test with: 2020.3.37f1, 2021.3.7f1, 2022.1.12f1 (UI Toolkit default inspectors are not introduced)

Reproduced on: Windows 10

Note: the workaround for this issue is to switch by switching back to the IMGUI Default Inspector in Project Settings