How to reproduce:
1. Open the user’s attached “Bug localization addressable labels.zip” project
2. Open the “Addressables Groups” window (Menu > Asset Management > Addressables > Groups)
3. Expand “Default Local Group (Default” and “Assets/Project assets”
4. In the Project window, go to Assets > Project assets > Localized assets and select “New material” material
5. Right-click and select “Reimport”
6. Open the “Localization Tables” window (Menu > Asset Management > Localization Tables) and assign “New material” to the “English” field
7. Observe the “Labels” fields of expanded fields in the “Addressables Groups” window

Expected result: Fields are empty
Actual result: “Locale-en” are in the field

Reproducible with: 1.20.0 (2021.3.34f1), 1.21.19 (2021.3.34f1, 2022.3.17f1), 2.0.6 (2023.2.6f1, 2023.3.0b3)
Not reproducible with: 1.19.19 (2021.3.34f1)

Reproduced on: macOS 13.6.3 (Intel)
Not reproducible on: No other environment tested

Note: reproduced with different Localization packages (1.3.1, 1.5.0-pre.5)