how to use New assetbundle system for UGUI ?

:frowning: i have set the ugui prefab single assetbundlename
and set the same packing tag of all sprites.

when i build the assetbundles.

the ui.prefab.assetbundle = 66kb and found the dependencies of this prefab is the right target sprites assetbundle.

and the sprite’s assetbundle = 78kb

why the size of both is almost the same.

Having the same problem.
Anyone has a solution?