keactrl try to stop kea services twice?

It looks like keactrl try to stop kea-dhcp4 and kea-ctrl-agent twice:

1. start:

wlodek@debian9-64-2:~ $ sudo /home/wlodek/installed/git/sbin/keactrl start
INFO/keactrl: Starting /home/wlodek/installed/git/sbin/kea-dhcp4 -c /home/wlodek/installed/git/etc/kea/kea.conf
INFO/keactrl: Starting /home/wlodek/installed/git/sbin/kea-ctrl-agent -c /home/wlodek/installed/git/etc/kea/kea.conf
wlodek@debian9-64-2:~ $ 2019-03-14 03:47:15.082 INFO  [kea-ctrl-agent.ctrl-agent/380] CTRL_AGENT_STARTED Kea Control Agent version 1.5.0-git started

2. check:

wlodek@debian9-64-2:~ $ ps -aux | grep kea
root       372  0.2  1.2 145160 19752 pts/0    S    03:47   0:00 /home/wlodek/installed/git/sbin/kea-dhcp4 -c /home/wlodek/installed/git/etc/kea/kea.conf
root       380  0.0  0.5  69744  8204 pts/0    S    03:47   0:00 /home/wlodek/installed/git/sbin/kea-ctrl-agent -c /home/wlodek/installed/git/etc/kea/kea.conf
wlodek     390  0.0  0.0  11108   968 pts/0    S+   03:47   0:00 grep kea

3. stop:

wlodek@debian9-64-2:~ $ sudo /home/wlodek/installed/git/sbin/keactrl stop 
INFO/keactrl: Stopping kea-dhcp4...
ERROR/keactrl: Stop failed, could not send signal 15 to process , PID 372.\n
INFO/keactrl: kea-dhcp6 isn't running.
INFO/keactrl: kea-dhcp-ddns isn't running.
INFO/keactrl: Stopping kea-ctrl-agent...
ERROR/keactrl: Stop failed, could not send signal 15 to process , PID 380.\n
2019-03-14 03:47:27.591 INFO  [kea-ctrl-agent.dctl/380] DCTL_SHUTDOWN Control-agent has shut down, pid: 380, version: 1.5.0-git
INFO/keactrl: kea-netconf isn't running.

we don't want to see this ERROR/keactrl: Stop failed, could not send signal 15 to process , PID 372.\n especially when kea was stopped successfully:

wlodek@debian9-64-2:~ $ ps -aux | grep kea
wlodek     446  0.0  0.0  11108   948 pts/0    S+   03:47   0:00 grep kea

Looks like this was a build when it was introduced: https://jenkins.isc.org/job/kea-master-system-tests-v6/120/ so during fight with shell check