The Wild Hunt Leaf Dance Aura memento only lasts 15-20 seconds and the cooldown is at least 2 minutes 30 seconds. This used to last almost as long as the cooldown, like the storm atronach mementos and Dwemervamidium Mirage memento. All mementos last nearly as long as their cooldown.

Also, the Dwarven Tonal Forks memento doesn't last nearly as long as all other aura creating mementos from the crown crates. This should be updated to be longer duration with such a cool glow effect.

Another bug, the cooldown for all short duration mementos is not showing properly on the skill bar and collections menu, at least in gamepad ui, because it shows almost ready to be activated again as soon as you activate them. It's like the quick slot square is set to always show every cooldown as if it is at least 2 minutes 30 seconds so a 15 second memento shows 85% complete on cooldown immediately after activation so you don't have an easy indication of when it is actually ready and going to be ready.

I know these things may seem little, but they're one step away from major bugs that may make all mementos take over 2 minutes to cooldown or make them completely unusable.