Reproduction steps:
1. Open the attached project.
2. Play the 'main' scene.
3. Check the output in the Game view.

“high ready = True, readonly = True, spaceOccupied = 1044038” is correct (These are the asset bundles in the “StreamingAssets” folder which was added.
(we say we can add caches of folders in the StreamingAssets, but it doesn’t work with sub assets, (Mid / Low) )
which leads mid/low to say that they are working correctly “mid ready = True” But is not detecting AssetBundles in there “spaceOccupied = 0"

Getting an assetBundle that is in the StreamingAssets cache (jazz band.1920 is in the High asset bundle cache). But when you use UWRequest to get a bundle that has the same assetHash (or the bundle from StreamingAssets) There is a bundle about half way through the logs that is downloaded in the uploaded project, which is downloaded from outside of the project (next to Assets folder). It is storing it to the default cache and loading it from there instead of using the assigned Cache

Reproduced with:
2017.3.0f1, 2017.3.2f1, 2018.1.0b13, 2018.2.0a6