Non-bold Japanese characters become bolder when the first button has those characters in bold in a custom window rootVisualElement

Reproduction steps:
1. Open the “FontBug.zip” project
2. Open a new custom “Test Window” (Window > Custom > Test Window)
3. Observe the “Test Window”

Expected results: All characters on the “normal” buttons are non-bold
Actual results: The characters that are on the first “bold” button, are bolder on the “normal” buttons

Reproducible with: 2021.3.39f1, 2022.3.34f1, 2023.3.0b1
Not reproducible with: 6000.0.6f1
Fixed in: 2023.3.0b2

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