Working as intended.....................

Guys it just happened with me too, apparently it is a Nebula bug.
I was fighting Wolverine in arena when I used her third special attack, then after the special 3 animation this happened.

Solswerd

Nebula has a secret "warm milk" buff....gets them everytime....

SCARE

nebula puts those guys to sleep cause of how boring the fight is XD

Kabam Vydious

Hi there -

We're currently aware of this issue and are investigating a fix for it. I'll be closing this thread as we already have one open on the matter over HERE.