So, apparently there's a second buff that you can get from this, also called Lotus Map. I'd actually gotten it a few times before, I now realize, but I hadn't been paying attention. Looks like it's a matter of being etheric when you use the skill, although can't confirm it just yet. Might be using the skill when you already have energy of Ardent Investigator. I've currently got 50 energy of Ardent Investigator and 74 of Lotus Map, though, so you can have both at the same time.
Lotus Map / Discussion