Font Fallback selects characters from the wrong Font Asset when the Fallback Font Asset's Font Weight fields are set to use Font Asset

Reproduction steps:
1. Open the attached project “TestFontFallback”
2. Open the “Assets/Scenes/SampleScene” Scene
3. Inspect the Game view

Expected result: The first line is rendered in bold characters, and the second line is rendered in regular characters
Actual result: Both lines are rendered in bold characters

Reproducible with: 2021.3.29f1, 2022.3.7f1, 2023.1.8f1, 2023.2.0b4

Reproducible on: macOS 13.4.1 (c)
Not reproducible on: No other environment tested