Hi,
We found out the cause of this issue.
This is because the YOLO network resolution is 416x416.
However, there is no limitation on the size of object crops sent for secondary inference.
Jetson scaling will fail for factor of 16.
To fix this, please set input-object-min-width = 28 and input-object-min-height = 28.
We have verified that YOLO can work correctly as secondary detector with the update.
secondary_detector_config.txt
[property]
...
input-object-min-width=28
input-object-min-height=28
Thanks.