I'm pretty sure it's a glitch. Has happened to me a lot and I don't use Evil Cole. I honestly want to say that it happens when someone ragequits because the majority of the times it's happened to me has been when me or a partner get to level 3 and/or do other things that typically make someone ragequit in this game. But I don't know why it happens so it's just speculation.
Who would win, Jedi Charizard or Jedi Jigglypuff? "I'm a bagel whore" -blazin640