Quest Issue: Ivan's Remains: box doesn't combine

[Corvida]

Hi,
Not sure if this is a Green issue only, but the last leg of the "Ivan McMannus' Remains" quest, which requires you to combine the remains in the box so that you can turn the quest in, doesn't work.
I have all the remains, but at no point from when I receive the box from Megan, all the way to having the remains collected and attempting to combine them, does it identify as anything other than "Empty Box". Trying to combine it results in "You cannot combine these items in this container type!"

Help?