Hi!
* After being a Werewolf for 2.5 seconds, gain 20% Attack Speed for 15 seconds.
* After being a Werebear for 2.5 seconds, deal 20% increased damage for 15 seconds.
But:
While you are wearing a unique chest item: [Mad Wolf’s Glee]
Which grants:
Werewolf form is now your true form, and you gain +2 Ranks to all Werewolf Skills.
You don’t get a 20 % attack speed at all.
Also wearing this item prevents from using [Quickshift] talent.
It also limits builds possibilites for werewolf druid.
it is not a bug, it’s woking as intended, the unique is meant for you to stay in the werewolf form - a full werewolf build. that talent is for shapeshifting - if you swap between forms.
Feels like a bug to me… the passive states “beeing a werewolf for 2.5 Seconds”. This doesn’t refer to shapeshifting. Besides that: It doesn’t trigger even if you do shapeshift, but the other way around, using a non shapeshift skill transforms you back to human and than back to wolf. Technically doing the same as if you were to use a shapeshift skill actively. So why wouldn’t it even trigger then? Doesn’t make sense from a design point of view.
I have this skill for my wolves… it works for them… they get like 0.000001% faster 
after two and a half seconds, then they shift targets and it resets the counter…
100% a bug. What i’ve been doing is taking the chest piece off and activating the passive then re equip the piece to have it stick. It will fall off if you use your horse or go to town so you’ll have to redo it when needed
It does appear to be a bug - if you stay in WW form without the chest the buff refreshes every 2.5 seconds. Unless that one is a bug, which I find hard to believe since the vigorous aspect which gives %dmg reduction while in WW form is not triggered either, actually none of the abilities triggered on shapeshifting work when transforming using this unique.