Bug The AssetBundle can't be loaded because another AssetBundle with the same files is already loaded

I use Addressables 1.17.13 and find the situation below will shows error when Addressables.DownloadDependenciesAsync(key) is called after a update build. (key is one label every entry has)

3 bundle In 1 group and pack by label

• Bundle A:
  • PrefabA1 (has monobehavior reference PrefabC)
  • PrefabA2 (has dependence PrefabA2Child)
  • PrefabA2Child
• Bundle B:
  • PrefabB (has monobehavior reference PrefabA2Child)
• Bundle C:
  • PrefabC

And follow steps below it shows error "The Bundle A can't be loaded because another AssetBundle with the same files is already loaded"

1. Build Addressable
2. Make some changes to PrefabA2
3. Check update
4. Update Build Addressable

I have already sent a bug report (Case 1388193), but i expect to know how to workaround this problem.

I checked source code of addressable and found that when Addressables.DownloadDependenciesAsync() is called, ProvideResource() will get all bundles, and Bundle A will be required twice.(Bundle B dependence and Bundle A itself). Also the location.Hash in two times are different, because one Bundle A has dependence and the other does not.
Then i checked the RevertUnchangedAssetsToPreviousAssetState class, in ApplyAssetEntryUpdates()，it added location of Bundle A(Bundle B dependence) when "Update Build Addressable", but the ContentCatalogDataEntry added didn't have any dependence.
I don't know whether this is the reason for the error and how to fix it, please help.

 

The same problem occurred in Unity 2021.2.x Addressables 1.19.13

 

So this is a bug…I thought it's by design we have to notify users to restart game after DownloadDependencyAsync is done…..Thanks for the bug report and hope it can gets fixed…