Bug - Normal unexpected death

[Donitatita]

While in a breach battle, almost winning, a cerebella appears and I used a movement that was going to kill her right away, the fact is that when I kill her, she ends up killing me without cerebella making any movement. I took a closer look, and there was nothing that could have killed me. I found it quite strange. Now I can't reuse the characters I used for that battle, I basically lost the chance to win, I hope you can verify that bug.

 

[Bones]

Unfortunately without more details it's pretty tough to determine what happened or if there was even a bug involved. Minimally, I would need to know all 3 of your fighters, all 3 of the opposing fighters and any additional fight modifiers that were in play.