How is this possible?

My Scorch messenger team is heavily reliant on Light set for AP push, getting Valeeria a turn so she gets her protect up. If she doesn't the boss oneshots most of my team.

Occasionally... she just doesn't get her turn.

Now the fix on my end is fairly obvious, be faster. But why is this happening in the first place?

Speed tuned as CY (288 light), Lushang (221 light), Val (201), Ollie, Sloan. I dont see a cause of rng...