If user searched for audioclips in Project window, he is not able to preview them.

2. How we can reproduce it using the example you attached

1. Open project.
2. Enter "audio" in search field.
3. Open "Asset Store" tab.

Click on searched result (I've used 'harpy-pain-...wav" group to test.

Actual result:
In Version 5.4.0b5 (60658ab74c44):
Preview is now available (or shown as picture preview).
Error:
The AssetBundle 'Memory' can't be loaded because another AssetBundle with the same files is already loaded.
UnityEditor.EditorApplication:Internal_CallUpdateFunctions()

In Version 5.3.2f1 (e87ab445ead0) and Version 5.2.4f1 (98095704e6fe):
Preview is available, but clicking Play button on some files causes Error: Cannot create FMOD::Sound instance for resource archive and no sound available.

Errors:
The AssetBundle 'Memory' can't be loaded because another AssetBundle with the same files is already loaded.
UnityEditor.EditorApplication:Internal_CallUpdateFunctions()
Error: Cannot create FMOD::Sound instance for resource archive:/CAB-dadc9ff38f6f4034c82db260bda1deb1/CAB-dadc9ff38f6f4034c82db260bda1deb1.resource, (File not found. )
UnityEditor.DockArea:OnGUI()

In Version 5.0.4f1 (1d75c08f1c9c):
Preview is available always. Getting Error: Cannot create FMOD::Sound instance for resource sometimes.

Expected result: Available ausioclips must have ability to be previewed.

Is a regression since 5.3.2f1 (as preview is unavailable since then).