http://na.finalfantasyxiv.com/lodest...826c9b66cff4ab
[Measure 2]
To address parties starting the duty with insufficient numbers, we are planning the addition of a feature which automatically adds members if required once duty has commenced. This countermeasure is planned for Frontline campaigns only and is scheduled for implementation sometime next week.
When you log in to the game, you get a message stating that this fix was rescheduled to mid-July.