Quest3 timewarp 3 times per frame?

hi guys:

     I was new to quest3, recently read an article "A VR Frame’s Life"

     in that article said, "On both Quest1 and Quest2, its per-frame work is split in 2 for latency optimisations, preempting your application usually twice per frame as it runs every 7ms"

      however, when I use MQDH to capture quest3 systrace, I found that was 3 times of timewarp

      Is anyone know why?, previous design it seems one for left eye one for right eye

      regards, leon