Ubuntu always restarts on shutdown

Whenever I shutdown Ubuntu, it always restarts

I have seen that a lot of people have asked the question above, but I think my situation might be different

I have Windows installed on a separate partition. Whenever I shutdown Windows it stays shutdown and doesn't restart. This leads me to believe that the problem isn't related to the BIOS (and none of the BIOS power settings allow for an automatic restart anyway)

Is there any purely Ubuntu OS setting that might be triggering a restart?

EDIT: Shutdown is performed via the system panel in the top right corner.

Restart also occurs when performing shutdown using systemctl poweroff or shutdown nowcommands in the terminal

EDIT 2: Having performed Waltinator's instructions, there are no obvious problems indicated in the logs. The computer completes a shutdown, and then boots, without any indication (that I can see) that something went wrong. No reason is given for the boot either.

Nov 23 08:09:07 computername systemd[1]: systemd-remount-fs.service: Deactivated successfully.Nov 23 08:09:07 computername systemd[1]: Stopped Remount Root and Kernel File Systems.Nov 23 08:09:07 computername systemd[1]: Reached target System Shutdown.Nov 23 08:09:07 computername systemd[1]: Reached target Late Shutdown Services.Nov 23 08:09:07 computername systemd[1]: systemd-poweroff.service: Deactivated successfully.Nov 23 08:09:07 computername systemd[1]: Finished System Power Off.Nov 23 08:09:07 computername systemd[1]: Reached target System Power Off.Nov 23 08:09:07 computername systemd[1]: Shutting down.Nov 23 08:09:07 computername systemd-shutdown[1]: Syncing filesystems and block devices.Nov 23 08:09:07 computername systemd-shutdown[1]: Sending SIGTERM to remaining processes...Nov 23 08:09:07 computername systemd-journald[381]: Journal stopped-- Boot f6afdb5b374443c0b75cf586919542ba --Nov 23 08:09:35 computername kernel: Linux version 6.2.0-37-generic (buildd@bos03-amd64-055) (x86_64-linux-gnu-gcc-11 (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0, GNU ld (GNU Binutils for Ubuntu) 2.38) #38~22.04.1->Nov 23 08:09:35 computername kernel: Command line: BOOT_IMAGE=/boot/vmlinuz-6.2.0-37-generic root=UUID=fbf8902f-4eb5-4b1e-b079-899f72ab1846 ro quiet splash vt.handoff=7Nov 23 08:09:35 computername kernel: KERNEL supported cpus:Nov 23 08:09:35 computername kernel:   Intel GenuineIntelNov 23 08:09:35 computername kernel:   AMD AuthenticAMDNov 23 08:09:35 computername kernel:   Hygon HygonGenuineNov 23 08:09:35 computername kernel:   Centaur CentaurHaulsNov 23 08:09:35 computername kernel:   zhaoxin   Shanghai  Nov 23 08:09:35 computername kernel: BIOS-provided physical RAM map:

Thanks