I can certainly get behind this one.
I'm usually out in the field with a partner and we're not always that close to one another. It's annoying to have to either wait for the bag itself to go free for all (there usually isn't much time between going public and poofing so if we don't wait on it we're likely to lose it) or to have to run to each other to open them.
I spend more time saying to my partner "Your bag... again." than anything else.