Bug - Can't create frame from group on top right side within slots

The screenshot says it all, but here is an exact problem statement in text:

• If I create a slot, then within that slot select an image or anything, press Command G to make it a group. I cannot change the group into a frame on the top right. 
• If I do this outside of a slot, I have no problem changing the group into a frame (2nd screenshot shows the regular behavior)

Workaround is to Frame selection directly via right click on the layer name