Processes started inside a jail are only visible outside the jail

[Vlad GALU]

6.1-PRERELEASE

Inside the jail:
root at j1 / # /usr/local/sbin/lighttpd -f /usr/local/etc/lighttpd.conf
root at j1 / #
root at j1 / # ps ax | grep light
55816  p0  S+J    0:00.00 grep light
root at j1 / #

Outside the jail:
root at host / # ps ax | grep light
 6263  ??  S      0:47.85 /usr/local/sbin/lighttpd -f
/usr/local/etc/lighttpd.conf
81204  ??  SJ     0:00.01 /usr/local/sbin/lighttpd -f
/usr/local/etc/lighttpd.conf
85151  pa  S+     0:00.00 grep light
root at host / #

   There are two lighttpd instances - the host runs one as well. The
other one is the one started from within the jail.
   I don't know where to start investigating from.

--
If it's there, and you can see it, it's real.
If it's not there, and you can see it, it's virtual.
If it's there, and you can't see it, it's transparent.
If it's not there, and you can't see it, you erased it.