Camera Starts capturing from frame: 2

Hi,
We enabled the trace log from the Image Sensor and observed that the initial frame captured is frame:2. Is this a normal behavior? The frame capturing should start from frame:0 or frame:1 right? If yes, what could be the solution to fix this issue

Platform: Jetson TX2 NX

Please see the logs below for reference

269.657805: rtcpu_vinotify_event: tstamp:8687849979 tag:ATOMP_FS channel:0x00 frame:2 vi_tstamp:8687849589 data:0x00000000
kworker/4:1-773 [004] … 269.657812: rtcpu_vinotify_event: tstamp:8687855512 tag:CHANSEL_PXL_SOF channel:0x00 frame:2 vi_tstamp:8687855133 data:0x00000001
kworker/4:1-773 [004] … 269.657814: rtcpu_vinotify_event: tstamp:8687860503 tag:CHANSEL_LOAD_FRAMED channel:0x01 frame:2 vi_tstamp:8687860128 data:0x08000000
kworker/4:1-773 [004] … 269.657817: rtcpu_vinotify_event: tstamp:8688359528 tag:CHANSEL_PXL_EOF channel:0x00 frame:2 vi_tstamp:8688358755 data:0x043f0002
kworker/4:1-773 [004] … 269.657819: rtcpu_vinotify_event: tstamp:8688359647 tag:ATOMP_FE channel:0x00 frame:2 vi_tstamp:8688358838 data:0x00000000
kworker/4:1-773 [004] … 269.657821: rtcpu_vinotify_event: tstamp:8688370834 tag:ATOMP_FS channel:0x00 frame:3 vi_tstamp:8688370424 data:0x00000000

It’s could be cause by the sensor output frame before the NVCSI/VI ready.