System hangs at reboot/shutdown

I’m reading this kwin_x11 and QDBusConnection hanging on shutdown/reboot / Newbie Corner / Arch Linux Forums and this Kwin_x11 not stopping during shutdown

Looks very similar

My logs at the 90 second “block”

Jun 30 11:19:46 greg-inspiron5767 sddm[536]: Signal received: SIGTERM
Jun 30 11:19:47 greg-inspiron5767 sddm[536]: QProcess: Destroyed while process ("/usr/lib/sddm/sddm-helper") is still running.
Jun 30 11:21:15 greg-inspiron5767 systemd[1]: session-1.scope: Stopping timed out. Killing.
Jun 30 11:21:15 greg-inspiron5767 systemd[1]: session-1.scope: Killing process 1023 (kded5) with signal SIGKILL.
Jun 30 11:21:15 greg-inspiron5767 systemd[1]: session-1.scope: Killing process 1029 (n/a) with signal SIGKILL.
Jun 30 11:21:15 greg-inspiron5767 systemd[1]: session-1.scope: Killing process 1030 (n/a) with signal SIGKILL.
Jun 30 11:21:15 greg-inspiron5767 systemd[1]: session-1.scope: Killing process 1031 (gdbus) with signal SIGKILL.
Jun 30 11:21:15 greg-inspiron5767 systemd[1]: session-1.scope: Failed with result 'timeout'.

theirs

Nov 11 16:47:37 iris sddm[676]: Signal received: SIGTERM
Nov 11 16:47:38 iris sddm[676]: QProcess: Destroyed while process ("/usr/lib/sddm/sddm-helper") is still running.
Nov 11 16:47:38 iris systemd[1]: sddm.service: Consumed 18.465s CPU time.
Nov 11 16:49:06 iris systemd[1]: session-1.scope: Stopping timed out. Killing.
Nov 11 16:49:06 iris systemd[1]: session-1.scope: Killing process 953 (kwin_x11) with signal SIGKILL.
Nov 11 16:49:06 iris systemd[1]: session-1.scope: Killing process 1005 (n/a) with signal SIGKILL.
Nov 11 16:49:06 iris systemd[1]: session-1.scope: Killing process 1138 (CPMMListener) with signal SIGKILL.
Nov 11 16:49:06 iris systemd[1]: session-1.scope: Killing process 2238 (n/a) with signal SIGKILL.
Nov 11 16:49:06 iris systemd[1]: session-1.scope: Failed with result 'timeout'.

Tell me it’s not an arch/Manjaro bug.