[Solved]Animation Clips in Asset Bundle

Hi, I am trying to use asset bundle in my game. One bundle contains 4 animation clips and another one contains 1 animation clip. All these are ui sprite animation.I loaded assets from the first bundle and then from the second. But after loading the second asset bundle the animation clips in the first bundle are lost. The first set of animation clips don't become null but it seems that the key frames that contain the sprites are lost. I end up losing the assets that were loaded first. Has anyone else encountered this problem?

 

This seems to be a bug with Unity 5.6.1f1. Upgrading to 2017.3.1 resolved the issue.