Problem: systemctl restart sogo (also systemctl stop sogo) can cause a
segmentation fault entry in Kernel log (journal -k). Sometimes it happens and sometimes not (see below).

Kernel log:

kernel: sogod[359451]: segfault at 7ffd8f32dee3 ip 00007fd865928c2c sp 00007ffd0f32ddf8 error 4 in libc-2.31.so[7fd8657db000+15a000]
kernel: Code: 28 7f 4f 01 62 e1 fe 28 7f 54 17 ff 62 e1 fe 28 7f 5c 17 fe c3 48 39 f7 0f 87 cb 00 00 00 0f 84 b3 fe ff ff 62 e1 fe 28 6f 26 <62> e1 fe 28 6f 6c 16 ff 62 e1 fe 28 6f 74 16 fe 62 e1 fe 28 6f 7c
...

Hypothesis: The init-Skript may cause the problem.
Systemd uses the /etc/init.d/sogo script by means of the systemd-sysv-generator.

In its start) and restart) - Section there is the line
start-stop-daemon -c $USER --stop --pidfile $PIDFILE --retry=TERM/20/KILL/5 --oknodo.
The TERM timeout value (here 20) has an impact on causing the segmentation faults because it might be to low in some cases.