As title name implies, in today's datamined notes, it shows this.
Shapeshift into travel form, travel form appropriate to your current location, increasing movement speed on land, in water, or in the air protects the caster from Polymorph effects. Only useable outdoors. The act of shapeshifting frees the caster of movement impairing effects. Can't be cast in Tree of Life Form, Moonkin Form. Shapeshift. 5.6% of Base Mana. Instant.
Wonder if this means no stag form in flying areas, no aquatic form while indoors.