change priority symblic link number at /etc/nginx/modules-enabled, 
especially for all stream modules. 
use number greater than 50.

example:
change/rename 50-mod-stream-upsync.conf to 80-mod-stream-upsync.conf

# cd /etc/nginx/modules-enabled
# mv 50-mod-stream-upsync.conf 80-mod-stream-upsync.conf