Board Thread:The Quarters - Q & A/@comment-213.189.47.210-20170627093538/@comment-25085701-20170628154258

Actually, I believe it lasts until the first action you take after your Cron -- so if you click something after your day start, you will lose your buff as well. If someone else in your party is the Rogue, you won't get the buff until they cast the spell.

If people in your party don't log in for a few days, their buffs will appear to stack, but they lose them right as they log in.