My computer appears to hang when attempting to put it to sleep. I can hear the fans still running and see drive activity. Yet according to the journal it goes to sleep. Seems to be a recent issue. I would say roughly a month ago this was working. I have tried the 5.4 kernel line and have the same issue as well.
uname -r
5.10.61-1-MANJARO
-- Journal begins at Sat 2021-07-31 18:10:11 PDT, ends at Tue 2021-09-07 06:24:34 PDT. --
Sep 06 11:52:31 mj kernel: PM: suspend entry (deep)
Sep 06 11:52:31 mj systemd-sleep[12536]: Suspending system...
ββ Subject: System sleep state suspend entered
ββ Defined-By: systemd
ββ Support: https://forum.manjaro.org/c/support
ββ
ββ The system has now entered the suspend sleep state.
Sep 06 11:52:30 mj systemd[1]: Starting System Suspend...
ββ Subject: A start job for unit systemd-suspend.service has begun execution
ββ Defined-By: systemd
ββ Support: https://forum.manjaro.org/c/support
ββ
ββ A start job for unit systemd-suspend.service has begun execution.
ββ
ββ The job identifier is 3153.
Sep 06 11:52:30 mj systemd[1]: Reached target Sleep.
ββ Subject: A start job for unit sleep.target has finished successfully
ββ Defined-By: systemd
ββ Support: https://forum.manjaro.org/c/support
ββ
ββ A start job for unit sleep.target has finished successfully.
ββ
ββ The job identifier is 3154.
Sep 06 11:52:30 mj kscreenlocker_greet[12518]: Qt: Session management error: networkIdsList argument is NULL
Sep 06 11:52:30 mj kded5[1365]: plasma-nm: Network connectivity limited, scheduling notification
Sep 06 11:52:30 mj kded5[1365]: plasma-nm: Not emitting connection deactivated notification as we're about to suspend
Sep 06 11:52:30 mj kernel: r8169 0000:02:00.0 enp2s0: Link is Down
Sep 06 11:52:30 mj NetworkManager[549]: <info> [1630954350.4088] device (enp2s0): state change: disconnected -> unmanaged (reason 'sleeping', sys-iface-state: '>
Sep 06 11:52:30 mj avahi-daemon[546]: Interface enp2s0.IPv4 no longer relevant for mDNS.