systemd unexpectedly(?) terminates units with `Unexpected error response from GetNameOwner(): Connection terminated` during a "mount storm" about systemd

[mrc0mmand]

In all cases dbus-broker was used as the dbus... broker.

Just out of curiosity, I replaced dbus-broker with dbus-daemon on the Rawhide test machine and the results are the same:

...
[  974.472229] systemd[1]: Mounted tmp-mnt404.mount.
[  974.500563] systemd[1]: Mounted tmp-mnt405.mount.
[  974.523083] dbus-daemon[744]: [system] Failed to activate service 'org.freedesktop.systemd1': timed out (service_start_timeout=25000ms)
[  974.527767] systemd[1]: Mounted tmp-mnt406.mount.
[  974.555652] systemd[1]: Mounted tmp-mnt407.mount.
...
[  979.242541] systemd[1]: NetworkManager.service: Unexpected error response from GetNameOwner(): Connection terminated
[  979.242914] NetworkManager[766]: <info>  [1713629543.1759] caught SIGTERM, shutting down normally.
[  979.243545] NetworkManager[766]: <info>  [1713629543.1765] dhcp4 (eth0): canceled DHCP transaction
[  979.243663] NetworkManager[766]: <info>  [1713629543.1765] dhcp4 (eth0): activation: beginning transaction (timeout in 45 seconds)
[  979.243764] NetworkManager[766]: <info>  [1713629543.1766] dhcp4 (eth0): state changed no lease
[  979.243855] NetworkManager[766]: <info>  [1713629543.1767] manager: NetworkManager state is now CONNECTED_SITE
[  979.243957] dbus-daemon[744]: [system] Activating systemd to hand-off: service name='org.freedesktop.nm_dispatcher' unit='dbus-org.freedesktop.nm-dispatcher.service' requested by ':1.6' (uid=0 pid>
[  979.245558] NetworkManager[766]: <info>  [1713629543.1787] exiting (success)
[  979.255542] systemd[1]: systemd-logind.service: Unexpected error response from GetNameOwner(): Connection terminated
[  979.268549] systemd[1]: systemd-networkd.service: Unexpected error response from GetNameOwner(): Connection terminated
[  979.275493] systemd[1]: NetworkManager.service: Deactivated successfully.
[  979.275801] audit[1]: SERVICE_STOP pid=1 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0 msg='unit=NetworkManager comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? add>
[  979.286649] systemd[1]: systemd-resolved.service: Unexpected error response from GetNameOwner(): Connection terminated
[  979.300932] systemd[1]: avahi-daemon.service: Unexpected error response from GetNameOwner(): Connection terminated
[  979.301142] avahi-daemon[741]: Got SIGTERM, quitting.
[  979.301603] avahi-daemon[741]: Leaving mDNS multicast group on interface eth0.IPv6 with address 2620:52:0:bb:f816:3eff:fe67:3519.
[  979.301666] avahi-daemon[741]: Leaving mDNS multicast group on interface eth0.IPv4 with address 10.0.187.174.
[  979.301725] avahi-daemon[741]: Leaving mDNS multicast group on interface lo.IPv6 with address ::1.
[  979.301775] avahi-daemon[741]: Leaving mDNS multicast group on interface lo.IPv4 with address 127.0.0.1.
[  979.305061] avahi-daemon[741]: avahi-daemon 0.8 exiting.
[  979.308451] systemd[1]: avahi-daemon.service: Deactivated successfully.
[  979.308705] audit[1]: SERVICE_STOP pid=1 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0 msg='unit=avahi-daemon comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=>
[  979.321993] systemd[1]: udisks2.service: Unexpected error response from GetNameOwner(): Connection terminated
[  979.337345] systemd[1]: systemd-timesyncd.service: Unexpected error response from GetNameOwner(): Connection terminated
[  979.352637] systemd[1]: systemd-hostnamed.service: Unexpected error response from GetNameOwner(): Connection terminated
[  979.368100] systemd[1]: systemd-homed.service: Unexpected error response from GetNameOwner(): Connection terminated
[  979.379664] systemd[1]: systemd-homed.service: Deactivated successfully.
[  979.379912] audit[1]: SERVICE_STOP pid=1 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0 msg='unit=systemd-homed comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr>
[  979.399167] audit: BPF prog-id=50 op=UNLOAD
[  979.973431] systemd-journald[577]: [🡕] Suppressed 696657 messages from init.scope