Moving stack of items from one sim to another

I am also having this problem and it's very annoying.  

I can sell a whole stack from a sim' personal inventory by moving to the sell box.  I can also drag a stack of vegetables or fish to the refrigerator from the sim's inventory.

However, I can only move items to another sim one-by one.  Same thing, trying to move items from the family inventory.  Clicking on the corner triangle does nothing, currently, as of 4/15/15 (I've also updated the last patch).  

I don't know if this is intended or not, but it creates a lot of time-consuming hassle and extra clicking.   This is especially annoying with repair parts, or if a sim dies and items are transferred to family inventory.  I really hope they could add this quality of life improvement.