Scaling when performing an FBX import has odd effect on rigged characters


I’ve created a small rigged test character in Maya 2015 and imported it into UE 4.6.1 as FBX. The model in Maya is in different units than the UE level which is why I need to scale it up during input. When I try to pose the scaled character inside the editor, the mesh is only minimally affected by bone rotations. I need to turn a bone by several revolutions to see a tiny effect on the mesh. However, if I import the mesh without scaling, posing works as expected. Is this a bug or expected behaviour?