Headless mode creates zombie

Hi.
I’m running soffice in headless mode and it leaves 1 zombie process.
I start it with:
/opt/libreoffice4.4/program/soffice.bin --headless

“ps aux| grep sof” shows me this:

root 3067 1.0 3.9 591180 40312 pts/0 Sl+ 08:31 0:00 /opt/libreoffice4.4/program/soffice.bin --headless

root 3069 0.0 0.0 0 0 pts/0 Z+ 08:31 0:00 [soffice.bin]

the process gets SIGCHLD signal but doesn’t issue wait()

— SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3069, si_status=1, si_utime=0, si_stime=0} —

[edit: speling]