Cannot download app from family sharing (app already downloaded)

I have recently configured Family Sharing (2 accounts are currently part of it). Most of the apps download just fine, but there are some exceptions.

Example: account A has Twitter in its purchased list; if account B tries to download Twitter from the store, the little cloud icon appears (and this is expected, since the app has indeed been downloaded by a family member already), but the download fails with an error message that says that the app has already been purchased by another user.

Is there a way to solve this?