Hello. Warder weakness is only lasting a second if that and then goes gray. It won't let you use any of the special abilities. It was working fine last night. I tried re-summoning a Warder but that didn't work, logged out and in both to character select and desktop and that didn't help either. Thanks for looking into this.
Thank you for reporting this one! I just checked in a fix and it should be working with the next build.