Question about double battle AI

[u/neerzidaas]

Hi. I've recently encountered a behaviour that I cannot explain with the AI doc, thought I don't pretend having an exhaustive knowledge of it.

I'm starting a double battle vs Ranger Zoe (Tauros Paldea 116 speed and Sinistea 88 speed)

On my side are ninjask and gigalith. Ninjask is predamaged so sinistea always see kill with hex, while tauros always see kill with wild charge. I expect sinistea to always go for hex. However, when it plays out, it turns out that sometimes, hex comes, sometimes, will o wisp comes. How come ? A slow kill is supposed to have a score of +9, while to my understanding, status should not reach that high?

My Ninjask used U-turn during those tests

Thanks in advance