"Save and add another" doesn't

On the add customer page the save button has a disclosure triangle which give you the option to "Save and add another". That option does not work.

I've just spent some time adding 25 new customers using "Save and add another" each time. At the end I discovered that only the last customer was saved. It seems like "Save and add another" is working more like "Save and continue editing"

As you can imagine all that lost data entry work is very annoying.