Duplicate frames on one camera but not the other?

[pisymbol .]

My glorious pipeline;

matroskamux name=muxer streamable=true ! multifilesink name=mfsink
post-messages=true next-file=5 max-file-duration=\"{}\" location=\"{}\"
nvcamerasrc queue-size=50 do-timestamp=true enable-meta=true fpsRange="30.0
30.0" auto-exposure=1 aeLock=true sensor_id=0 name=nvcam0 ! queue !
identity name=tap0
! video/x-raw(memory:NVMM), width=(int)4104, height=(int)3046,
format=(string)I420, framerate=(fraction)30/1
! nvvidconv flip-method=2 ! video/x-raw(memory:NVMM), width=(int)3840,
height=(int)2160, format=(string)I420
! omxh264enc bitrate=30000000 ! video/x-h264,
stream-format=(string)byte-stream ! h264parse ! muxer.video_0
nvcamerasrc queue-size=50 do-timestamp=true enable-meta=true fpsRange="30.0
30.0" auto-exposure=1 aeLock=true sensor_id=1 name=nvcam1 ! queue !
identity name=tap1
! video/x-raw(memory:NVMM), width=(int)4104, height=(int)3046,
format=(string)I420, framerate=(fraction)30/1
! nvvidconv flip-method=2 ! video/x-raw(memory:NVMM), width=(int)3840,
height=(int)2160, format=(string)I420
! omxh264enc bitrate=30000000 ! video/x-h264,
stream-format=(string)byte-stream ! h264parse ! muxer.video_1

Normally it's configured for minute intervals (max-file-duration etc.).

Can someone speculate on why sensor_id=1's stream would be choppy on
playback but sensor_id=0's is super smooth? Person is claiming that
sensor_id=1 is getting duplicate frames in the stream while on sensor_id=0
everything looks fine. And it's ALWAYS sensor_id=1 never 0.

I don't see actual frame drops per se (i.e. my identity plugin is
timestamping and looking at the hardware frame number). I can remove
timestamping the sensor_id=1 stream but it still sees choppiness.

Is this a clocking issue with the stream? I'm at a loss on why this would
be and why always sensor_id=1???

Cheers!

-aps
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