Sometimes 'add family' doesn't work

Rather than adding children one at a time i attempted to add all seven of them in one go by clicking 'Add: family', however, it simply added nobody, forcing me to then add them one at the time again. That is a rather annoying bug, as potentially (when adding a lot of information) one could just not notice that information wasn't added and move on; this in turn would result in the dataloss.