F10/exit leaves 2 orphaned processes behind

[Bernward]

mc with subshell support opens 3 processes,
two of them are left orphaned behind after exit.

How to reproduce/monitor:
I monitor processes in a first window with

while true; do clear; ps -f; sleep 1; done

After opening mc with /usr/local/bin/mc in second window
the monitor extends by following lines:

68246 pa S+ 0:00.13 | `-- /usr/local/bin/mc
49883 pb T+p 0:00.01 | `-- /bin/ksh

5455 pb Z+p 0:00.00 | `-- (ksh)

After exit of mc with F10 these 2 lines remain;

49883 pb T+p 0:00.01 /bin/ksh

5455 pb Z+p 0:00.00 - (ksh)

This behavior does not ocur when I start mc with option -u.

System : OpenBSD 7.2
Details : OpenBSD 7.2 (GENERIC.MP) #6: Sat Jan 21 01:03:04 MST 2023

root@…:/usr/src/sys/arch/amd64/compile/GENERIC.MP

Architecture: OpenBSD.amd64
Machine : amd64

Regards, Bernward

[Bernward]

mc version

[Bernward]

compiled-in paths

[Bernward]

configure options

[andrew_b]

ksh isn't supported as subshell.