超时命令后的脚本输出

i use symfony (php framework) task class to create cli scripts. Currently i wrote this kind of script:

#!/bin/bash
timeout 3600 ./symfony pparse:prices

But there is no output, I need that script will exit after 3600 sec. and ./symfony pparse:prices output data to console. Timeout is working, but no output.

I dont know why, but currently it work fine. Maybe this is issue to OS.