Multiple Armature animations importing in just fine, but not working in Mechanim

Hi, so I've created some animations in blender and imported them into Unity. It is 3 objects in total, the main body and 2 fists. The fists have their own bone (in blender, its a separate armature) and they are parents to the body's shoulder bones. However, they move independently a lot, without being dragged by the shoulder bones. Anyway, importing this into Unity was fine, and it works as expected. However, in the Animator window, the Fists arent moving, or at least they arent moving independently (by that I mean, if they werent they'd just be following the shoulder bone), meaning they are only moving as the shoulder does, not on their own.

Seeing as this is probably hard to understand, I've made a video for it

If it helps, I imported it as just a blender file (I just dragged and dropped it in). Hope you guys can help!

 

Bump

 

Alright I need to go to bed now, I just really need to get this fixed so I'll bump again. Please, if you have any idea, it'd be greatly appreciated

 

Damn, looks like there isnt a solution, over 50 people have seen this and still nothing

 

I tried with FBX, sadly the same results. I've filed the report like you said, and the reference number is 633768. Thanks for the help!

 

I've discovered something more about the issue. Its something to do with my animator controller, because making a new controller with just the punch in works fine, the issue is something to do with the transition between One animation and another

 

does the armature have the minimum number of bones expected by unity?