"If you double click an item to equip it to your character, your character loses ALL Passives/Racials/Permanent Buffs, forever.
Dragging and dropping works fine, but do not double click or you might find yourself having to restart your game. Loading the game up from a previous save thankfully does fix it.
webm of the bug in action: http://webmup.com/HArIv/vid.webm
As you can see, I lose several passive effects (And am already missing my Wood Elf racial from a previous time before I learned about the bug), including a talent and a class ability. The abilities remain listed in the abilities/talents section, but if they aren't in active effects, then perhaps you've already encountered the bug first hand.
EDIT: Another webm http://webmup.com/aDSfX/vid.webm
Kana loses his 3rd Weapon Slot as soon as I double click so it's not just a visual display bug, you do actually lose all bonuses.
Also thought I'd stress that it only happens when you double click to REPLACE an item, if the slot is empty you won't lose anything. So please double check before you post saying that it isn't happening to you."
Everyone who has actively tested this has confirmed this.
Removing characters from your party and then adding them back apparently fixes the bug for party members. But the bug will come back if you double-click to equip items... No fix for PC though.
Anbokr from Reddit:
"Just a heads up, I've tested several of my barbarian passives, and even though they are bugged and not showing under active effects, they are still working behind the scenes. Same deal with my human racial."
No one has confirmed his testings however.
Update 3: More reports that PC passive's/talents/etc aren't working like Nature Godlike's racial due to this bug.
Edited by TrueMenace, 28 March 2015 - 02:49 PM.