Advanced SSH Script Sensor Orphans Processes

Good morning!

I have an advanced SSH Script Sensor in PRTG. It runs a script that has a chance to hang indefinitely. When it runs, I can see on the target server that the sshd process gets created as expected, and we have subprocesses for the script and the commands:

[user@server ~]# ps -ef | grep prtg
root     26698  1553 30 11:22 ?        00:00:00 sshd: prtgadm [priv]
prtgadm  26707 26698  0 11:22 ?        00:00:00 sshd: prtgadm@notty
prtgadm  26708 26707  0 11:22 ?        00:00:00 -bash
prtgadm  26719 26708  0 11:22 ?        00:00:00 /bin/bash /var/prtg/scriptsxml/disk_free.sh
prtgadm  26764 26719  0 11:22 ?        00:00:00 stat -f -c %b /user/prtg_test_monitor
[user@server ~]#

When the script hangs indefinitely, PRTG will try to kill it after the timeout (shell timeout is 10 seconds in my case). I've found that, while the sshd processes get killed correctly, the shell is not killed, but orphaned. The process and it's subprocesses linger:

[user@server ~]# ps -ef | grep prtg
prtgadm  26708 1      0 11:22 ?        00:00:00 -bash
prtgadm  26719 26708  0 11:22 ?        00:00:00 /bin/bash /var/prtg/scriptsxml/disk_free.sh
prtgadm  26764 26719  0 11:22 ?        00:00:00 stat -f -c %b /user/prtg_test_monitor
[user@server ~]#

Is there a way to get PRTG to correctly kill it's sshd process and all subprocesses?