Hi Salvatore,
sorry for not sending a reply. I completely forgot this bug report.
Fortunately it appears to be still open.
I ran into this problem again just a few minutes ago on running apt upgrade.
Several services were restarted in parallel, using "needrestart".
journalctl shows:
Apr 21 12:33:56 tweety.afaics.de systemd[1]: Reexecuting requested from client
PID 1905554 ('systemctl') (unit session-5140.scope)...
Apr 21 12:33:56 tweety.afaics.de systemd[1]: Reexecuting.
Apr 21 12:33:56 tweety.afaics.de systemd[1]: systemd 255.4-1+b1 running in system mode (+PAM +AUDIT +SELINUX +APPARMOR +IMA +SMACK +SECCOMP +GCRYPT -GNUTLS +OPENSSL +ACL +BLKID +CURL +ELFUTILS +FIDO2 +IDN2 -IDN +IPTC +KMOD +LIBCRYPTSETUP +LIBFDISK +PCRE2 -PWQUALITY +P11KIT +QRENCODE +TPM2 +BZIP2
+LZ4 +XZ +ZLIB +ZSTD -BPF_FRAMEWORK -XKBCOMMON +UTMP +SYSVINIT default-hierarchy=unified)
Apr 21 12:33:56 tweety.afaics.de systemd[1]: Detected architecture x86-64.
Apr 21 12:34:21 tweety.afaics.de systemd[1]: Stopping acpid.service - ACPI
event daemon...
Apr 21 12:34:21 tweety.afaics.de systemd[1]: Stopping apache2.service - The
Apache HTTP Server...
Apr 21 12:34:21 tweety.afaics.de systemd[1]: Stopping atd.service - Deferred
execution scheduler...
Apr 21 12:34:21 tweety.afaics.de systemd[1]: atd.service: Deactivated
successfully.
Apr 21 12:34:21 tweety.afaics.de systemd[1]: Stopped atd.service - Deferred
execution scheduler.
Apr 21 12:34:21 tweety.afaics.de systemd[1]: Starting atd.service - Deferred
execution scheduler...
Apr 21 12:34:21 tweety.afaics.de systemd[1]: Stopping autofs.service -
Automounts filesystems on demand...
Apr 21 12:34:21 tweety.afaics.de avahi-daemon[642]: Got SIGTERM, quitting.
Apr 21 12:34:21 tweety.afaics.de avahi-daemon[642]: Leaving mDNS multicast
group on interface br0.IPv6 with address 2003:e3:1f0c:1703:8865:8fff:feb7:694d.
Apr 21 12:34:21 tweety.afaics.de systemd[1]: Stopping avahi-daemon.service -
Avahi mDNS/DNS-SD Stack...
Apr 21 12:34:21 tweety.afaics.de avahi-daemon[642]: Leaving mDNS multicast
group on interface br0.IPv4 with address 10.42.100.150.
Apr 21 12:34:21 tweety.afaics.de avahi-daemon[642]: Leaving mDNS multicast
group on interface lo.IPv6 with address ::1.
Apr 21 12:34:21 tweety.afaics.de avahi-daemon[642]: Leaving mDNS multicast
group on interface lo.IPv4 with address 127.0.0.1.
Apr 21 12:34:21 tweety.afaics.de systemd[1]: auth-rpcgss-module.service -
Kernel Module supporting RPCSEC_GSS was skipped because of an unmet condition
check (ConditionPathExists=/etc/krb5.keytab).
Apr 21 12:34:21 tweety.afaics.de systemd[1]: Stopping cron.service - Regular
background program processing daemon...
Apr 21 12:34:21 tweety.afaics.de systemd[1]: Stopping nfs-server.service - NFS
server and services...
Apr 21 12:34:21 tweety.afaics.de systemd[1]: cron.service: Deactivated
successfully.
Apr 21 12:34:21 tweety.afaics.de systemd[1]: cron.service: Unit process 1027
(inoticoming) remains running after unit stopped.
Apr 21 12:34:21 tweety.afaics.de systemd[1]: cron.service: Unit process 1031
(inoticoming) remains running after unit stopped.
Apr 21 12:34:21 tweety.afaics.de systemd[1]: cron.service: Unit process 1035
(gpg-agent) remains running after unit stopped.
Apr 21 12:34:21 tweety.afaics.de systemd[1]: cron.service: Unit process 1170
(vncserver) remains running after unit stopped.
Apr 21 12:34:21 tweety.afaics.de systemd[1]: cron.service: Unit process 1171
(Xtigervnc) remains running after unit stopped.
Apr 21 12:34:21 tweety.afaics.de systemd[1]: cron.service: Unit process 1225
(xstartup) remains running after unit stopped.
Apr 21 12:34:21 tweety.afaics.de systemd[1]: cron.service: Unit process 1234
(ssh-agent) remains running after unit stopped.
Apr 21 12:34:21 tweety.afaics.de systemd[1]: cron.service: Unit process 1243
(xstartup) remains running after unit stopped.
Apr 21 12:34:21 tweety.afaics.de systemd[1]: cron.service: Unit process 1245
(fvwm3) remains running after unit stopped.
Apr 21 12:34:21 tweety.afaics.de systemd[1]: cron.service: Unit process 1353
(xterm) remains running after unit stopped.
Apr 21 12:34:21 tweety.afaics.de systemd[1]: cron.service: Unit process 1354
(xterm) remains running after unit stopped.
Apr 21 12:34:21 tweety.afaics.de systemd[1]: cron.service: Unit process 1355
(xterm) remains running after unit stopped.
Apr 21 12:34:21 tweety.afaics.de systemd[1]: cron.service: Unit process 1356
(xterm) remains running after unit stopped.
Apr 21 12:34:21 tweety.afaics.de systemd[1]: cron.service: Unit process 1359
(FvwmPager) remains running after unit stopped.
Apr 21 12:34:21 tweety.afaics.de systemd[1]: cron.service: Unit process 1360
(FvwmAuto) remains running after unit stopped.
Apr 21 12:34:21 tweety.afaics.de systemd[1]: cron.service: Unit process 1361
(FvwmEvent) remains running after unit stopped.
Apr 21 12:34:21 tweety.afaics.de systemd[1]: cron.service: Unit process 1450
(watch) remains running after unit stopped.
Apr 21 12:34:21
