Here are the NetworkManager logs when I first disabled my networking (note that ensp5s0 does get its link up reported correctly, but no traffic seems to go over it):

Apr 23 09:42:54 surprise NetworkManager[1281]: <info>  [1587649374.1626] manager: disable requested (sleeping: no  enabled: yes)
Apr 23 09:42:54 surprise NetworkManager[1281]: <info>  [1587649374.1627] manager: NetworkManager state is now ASLEEP
Apr 23 09:42:54 surprise dbus-daemon[1280]: [system] Activating via systemd: service name='org.freedesktop.nm_dispatcher' unit='dbus-org.freedesktop.nm-dispatcher.service' requested by ':1.9' (uid=0 pid=1281 comm="/usr/sbin/NetworkManager --no-daemon " label="unconfined")
Apr 23 09:42:54 surprise NetworkManager[1281]: <info>  [1587649374.1654] device (enp5s0): state change: activated -> deactivating (reason 'sleeping', sys-iface-state: 'managed')
Apr 23 09:42:54 surprise NetworkManager[1281]: <info>  [1587649374.1695] device (virbr0): state change: activated -> deactivating (reason 'sleeping', sys-iface-state: 'external')
Apr 23 09:42:54 surprise NetworkManager[1281]: <info>  [1587649374.1703] device (lxdbr0): state change: activated -> deactivating (reason 'sleeping', sys-iface-state: 'external')
Apr 23 09:42:54 surprise NetworkManager[1281]: <info>  [1587649374.1711] device (docker0): state change: activated -> deactivating (reason 'sleeping', sys-iface-state: 'external')
Apr 23 09:42:54 surprise NetworkManager[1281]: <info>  [1587649374.1718] device (tun0): state change: activated -> deactivating (reason 'sleeping', sys-iface-state: 'external')
Apr 23 09:42:54 surprise NetworkManager[1281]: <info>  [1587649374.1744] device (mpqemubr0): state change: activated -> deactivating (reason 'sleeping', sys-iface-state: 'external')
Apr 23 09:42:54 surprise NetworkManager[1281]: <info>  [1587649374.1754] device (tap-2eb5e2d1a05): state change: activated -> deactivating (reason 'sleeping', sys-iface-state: 'external')
Apr 23 09:42:54 surprise NetworkManager[1281]: <info>  [1587649374.1756] device (mpqemubr0): bridge port tap-2eb5e2d1a05 was detached
Apr 23 09:42:54 surprise NetworkManager[1281]: <info>  [1587649374.1756] device (tap-2eb5e2d1a05): released from master device mpqemubr0
Apr 23 09:42:54 surprise NetworkManager[1281]: <info>  [1587649374.1764] device (tap-8b9ffd8bf3f): state change: activated -> deactivating (reason 'sleeping', sys-iface-state: 'external')
Apr 23 09:42:54 surprise NetworkManager[1281]: <info>  [1587649374.1765] device (mpqemubr0): bridge port tap-8b9ffd8bf3f was detached
Apr 23 09:42:54 surprise NetworkManager[1281]: <info>  [1587649374.1765] device (tap-8b9ffd8bf3f): released from master device mpqemubr0
Apr 23 09:42:54 surprise NetworkManager[1281]: <info>  [1587649374.2065] device (enp5s0): state change: deactivating -> disconnected (reason 'sleeping', sys-iface-state: 'managed')
Apr 23 09:42:54 surprise NetworkManager[1281]: <info>  [1587649374.2124] dhcp4 (enp5s0): canceled DHCP transaction
Apr 23 09:42:54 surprise NetworkManager[1281]: <info>  [1587649374.2124] dhcp4 (enp5s0): state changed extended -> done
Apr 23 09:42:54 surprise NetworkManager[1281]: <info>  [1587649374.2132] dhcp6 (enp5s0): canceled DHCP transaction
Apr 23 09:42:54 surprise NetworkManager[1281]: <info>  [1587649374.2133] dhcp6 (enp5s0): state changed bound -> done
Apr 23 09:42:54 surprise NetworkManager[1281]: <info>  [1587649374.2455] vpn-connection[0x55a3ea09c330,6c36b60c-84e0-42b3-85d0-8ddb549add83,"us-dwatkins",0]: VPN plugin: state changed: stopping (5)
Apr 23 09:42:54 surprise NetworkManager[1281]: <info>  [1587649374.2455] vpn-connection[0x55a3ea09c330,6c36b60c-84e0-42b3-85d0-8ddb549add83,"us-dwatkins",0]: VPN plugin: state changed: stopped (6)
Apr 23 09:42:54 surprise NetworkManager[1281]: <info>  [1587649374.2466] device (enp5s0): state change: disconnected -> unmanaged (reason 'sleeping', sys-iface-state: 'managed')
Apr 23 09:42:54 surprise NetworkManager[1281]: <info>  [1587649374.3121] device (virbr0): state change: deactivating -> disconnected (reason 'sleeping', sys-iface-state: 'external')
Apr 23 09:42:54 surprise NetworkManager[1281]: <info>  [1587649374.3588] device (lxdbr0): state change: deactivating -> disconnected (reason 'sleeping', sys-iface-state: 'external')
Apr 23 09:42:54 surprise NetworkManager[1281]: <info>  [1587649374.3655] device (docker0): state change: deactivating -> disconnected (reason 'sleeping', sys-iface-state: 'external')
Apr 23 09:42:54 surprise NetworkManager[1281]: <info>  [1587649374.3760] device (tun0): state change: deactivating -> disconnected (reason 'sleeping', sys-iface-state: 'external')
Apr 23 09:42:54 surprise NetworkManager[1281]: <info>  [1587649374.3819] device (mpqemubr0): state change: deactivating -> disconnected (reason 'sleeping', sys-iface-state: 'external')
Apr 23 09:42:54 surprise NetworkManager[1281]: <info>  [1587649374.4358] device (tap-2eb5e2d1a05): state change: deactivating -> disconnected (reason 'sleeping', sys-iface-state: 'external')
Apr 23 09:42:54 surprise NetworkManager[1281]: <info>  [1587649374.4381] device (tap-8b9ffd8bf3f): state change: deactivating -> disconnected (reason 'sleeping', sys-iface-state: 'external')
Apr 23 09:42:54 surprise NetworkManager[1281]: <warn>  [1587649374.4413] dns-sd-resolved[61f91f275b16a93b]: send-updates failed to update systemd-resolved: GDBus.Error:org.freedesktop.resolve1.NoSuchLink: Link 36 not known
Apr 23 09:42:54 surprise NetworkManager[1281]: <info>  [1587649374.4469] device (tun0): state change: disconnected -> unmanaged (reason 'unmanaged', sys-iface-state: 'removed')
Apr 23 09:42:54 surprise NetworkManager[1281]: <info>  [1587649374.4475] device (virbr0): state change: disconnected -> unmanaged (reason 'sleeping', sys-iface-state: 'external')
Apr 23 09:42:54 surprise NetworkManager[1281]: <info>  [1587649374.4520] device (lxdbr0): state change: disconnected -> unmanaged (reason 'sleeping', sys-iface-state: 'external')
Apr 23 09:42:54 surprise NetworkManager[1281]: <info>  [1587649374.4527] device (docker0): state change: disconnected -> unmanaged (reason 'sleeping', sys-iface-state: 'external')
Apr 23 09:42:54 surprise NetworkManager[1281]: <info>  [1587649374.4534] device (mpqemubr0): state change: disconnected -> unmanaged (reason 'sleeping', sys-iface-state: 'external')
Apr 23 09:42:54 surprise NetworkManager[1281]: <info>  [1587649374.4540] device (tap-2eb5e2d1a05): state change: disconnected -> unmanaged (reason 'sleeping', sys-iface-state: 'external')
Apr 23 09:42:54 surprise NetworkManager[1281]: <info>  [1587649374.4545] device (tap-8b9ffd8bf3f): state change: disconnected -> unmanaged (reason 'sleeping', sys-iface-state: 'external')
Apr 23 09:42:56 surprise NetworkManager[1281]: <info>  [1587649376.1783] manager: enable requested (sleeping: no  enabled: no)
Apr 23 09:42:56 surprise NetworkManager[1281]: <info>  [1587649376.1784] device (enp5s0): state change: unmanaged -> unavailable (reason 'managed', sys-iface-state: 'managed')
Apr 23 09:42:56 surprise NetworkManager[1281]: <info>  [1587649376.3035] device (virbr0): state change: unmanaged -> unavailable (reason 'managed', sys-iface-state: 'external')
Apr 23 09:42:56 surprise NetworkManager[1281]: <info>  [1587649376.3039] device (virbr0-nic): released from master device virbr0
Apr 23 09:42:56 surprise NetworkManager[1281]: <info>  [1587649376.3046] device (lxdbr0): state change: unmanaged -> unavailable (reason 'managed', sys-iface-state: 'external')
Apr 23 09:42:56 surprise NetworkManager[1281]: <info>  [1587649376.3050] device (veth873d95da): released from master device lxdbr0
Apr 23 09:42:56 surprise NetworkManager[1281]: <info>  [1587649376.3058] device (mpqemubr0): state change: unmanaged -> unavailable (reason 'managed', sys-iface-state: 'external')
Apr 23 09:42:56 surprise NetworkManager[1281]: <info>  [1587649376.3061] device (mpqemubr0-dummy): released from master device mpqemubr0
Apr 23 09:42:56 surprise NetworkManager[1281]: <info>  [1587649376.3061] device (tap-2eb5e2d1a05): released from master device mpqemubr0
Apr 23 09:42:56 surprise NetworkManager[1281]: <info>  [1587649376.3061] device (tap-8b9ffd8bf3f): released from master device mpqemubr0
Apr 23 09:42:56 surprise NetworkManager[1281]: <info>  [1587649376.3068] device (tap-2eb5e2d1a05): state change: unmanaged -> unavailable (reason 'managed', sys-iface-state: 'external')
Apr 23 09:42:56 surprise NetworkManager[1281]: <info>  [1587649376.3077] device (tap-8b9ffd8bf3f): state change: unmanaged -> unavailable (reason 'managed', sys-iface-state: 'external')
Apr 23 09:42:56 surprise NetworkManager[1281]: <info>  [1587649376.3088] manager: NetworkManager state is now DISCONNECTED
Apr 23 09:42:56 surprise NetworkManager[1281]: <info>  [1587649376.3092] device (lxdbr0): state change: unavailable -> unmanaged (reason 'connection-assumed', sys-iface-state: 'managed')
Apr 23 09:42:56 surprise NetworkManager[1281]: <info>  [1587649376.3112] device (virbr0): state change: unavailable -> disconnected (reason 'none', sys-iface-state: 'managed')
Apr 23 09:42:56 surprise NetworkManager[1281]: <info>  [1587649376.3118] device (mpqemubr0): state change: unavailable -> disconnected (reason 'none', sys-iface-state: 'managed')
Apr 23 09:42:56 surprise NetworkManager[1281]: <info>  [1587649376.3123] device (tap-2eb5e2d1a05): state change: unavailable -> disconnected (reason 'none', sys-iface-state: 'managed')
Apr 23 09:42:56 surprise NetworkManager[1281]: <info>  [1587649376.3128] device (tap-8b9ffd8bf3f): state change: unavailable -> disconnected (reason 'none', sys-iface-state: 'managed')
Apr 23 09:42:58 surprise NetworkManager[1281]: <info>  [1587649378.8952] device (enp5s0): carrier: link connected
Apr 23 09:42:58 surprise NetworkManager[1281]: <info>  [1587649378.8954] device (enp5s0): state change: unavailable -> disconnected (reason 'carrier-changed', sys-iface-state: 'managed')
Apr 23 09:42:58 surprise NetworkManager[1281]: <info>  [1587649378.8963] policy: auto-activating connection 'Wired connection 1' (a2c1dab1-5570-31cb-9d13-9912bc640c0b)
Apr 23 09:42:58 surprise NetworkManager[1281]: <info>  [1587649378.8968] device (enp5s0): Activation: starting connection 'Wired connection 1' (a2c1dab1-5570-31cb-9d13-9912bc640c0b)
Apr 23 09:42:58 surprise NetworkManager[1281]: <info>  [1587649378.8969] device (enp5s0): state change: disconnected -> prepare (reason 'none', sys-iface-state: 'managed')
Apr 23 09:42:58 surprise NetworkManager[1281]: <info>  [1587649378.8972] manager: NetworkManager state is now CONNECTING
Apr 23 09:42:58 surprise NetworkManager[1281]: <info>  [1587649378.8974] device (enp5s0): state change: prepare -> config (reason 'none', sys-iface-state: 'managed')
Apr 23 09:42:58 surprise NetworkManager[1281]: <info>  [1587649378.8979] device (enp5s0): state change: config -> ip-config (reason 'none', sys-iface-state: 'managed')
Apr 23 09:42:58 surprise NetworkManager[1281]: <info>  [1587649378.8981] dhcp4 (enp5s0): activation: beginning transaction (timeout in 45 seconds)