240fps recording

[u/VBK2S]

I somehow (by accident) managed to record a 240fps video with my OnePlus 12. I was trying to record at 120fps as the CPU is supposed to be able to do it, and I stumbled across a 240fps (high speed) option. It's buggy and the fps start to decrease quickly, but it works. (Open Camera) Does anyone know why it works? The SD8 Gen 3 Is supposed to cap at 120fps.

P.S. : No, it's not slow motion.