How to reproduce:
1. Open the attached “IN-136986“ project
2. Open the “SampleScene“ scene
3. Open the Addressables Groups window (Window > Asset Management > Addressables > Groups) and build the Asset Bundles (Build > New Build > Default Build Script)
4. Enter Play mode
5. In the Game view, click the “Unload & Reload Async“ button
6. Observe the loading bar UI

Actual result: Loading bar UI doesn’t show loading progress until the Assets are loaded
Expected result: Loading bar UI shows loading progress while the Assets are being loaded

Reproducible with: 2.0.8 (6000.0.0f1), 2.9.1 (6000.5.0a8)

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

Notes:
- Changing “Play Mode Script“ to “Use Existing Build“ highlights the issue more, as it takes longer to load the Assets
- Reproduces in the Player