Yup, I don't know how much exactly it's about them not being able to charge enough in one lap. I presume they basically turn off most of the harvesting on a qualifying lap so they have better brakes, but leaves them down on power. Which leaves them needing to turn up the charging in between.
They can use twice as much power as they can harvest. So they'll still harvest during their hot lap.
And Button in 11th.
Kobayashi in 15th.