Leafkin Cap +1 teleport not working??

I have the Leafkin Cap +1 and the SoA expansion.
With the cap it should be possible to teleport to Leafallia, but it's not working!

Is this a bug, or are there additional conditions that should be met in order for this to work?
If so it's not listed anywhere.

ty!
Amarylis, THF - Asura

How far have you progressed in the SoA storyline?
You need to be on Chapter 4-3-5 : A Shrouded Canopy to be able to enter Leafallia at all.

It'll likely start working once you've entered the zone for the first time, but as I stated, you can't access the area at all until you reach that mission.