Wired connection disconnects randomly

Question

After updating ubuntu 16 to ubuntu 20.04.1 the wired connection keeps disconnecting randomly.

The solution is manually turn off and on the connection from the upper left button. However, I am working remotely and that is not an option anymore.

I have tried solutions like this but they do not work for me.

This is the output of some commands that I think they might be useful when the connection is not working:

ifconfig:

eno1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet6 fe80::896d:d145:fe49:db08  prefixlen 64  scopeid 0x20<link>
        inet6 2a0c:5bc0:40:1028:df60:8e5c:3fb0:a0dd  prefixlen 64  scopeid 0x0<global>
        inet6 2a0c:5bc0:40:1028:60f4:f459:9371:5e6e  prefixlen 64  scopeid 0x0<global>
        inet6 2a0c:5bc0:40:1028:4597:f3aa:b00c:62bb  prefixlen 64  scopeid 0x0<global>
        ether 18:60:24:8b:fe:32  txqueuelen 1000  (Ethernet)
        RX packets 65344897  bytes 10798738778 (10.7 GB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 1644328  bytes 1140060185 (1.1 GB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
        device interrupt 20  memory 0xf3100000-f3120000  

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 90170  bytes 10380905 (10.3 MB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 90170  bytes 10380905 (10.3 MB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

nmcli d:

DEVICE  TYPE      STATE      CONNECTION        
eno1    ethernet  connected  Wired connection 1
lo      loopback  unmanaged  --    

cat /etc/NetworkManager/NetworkManager.conf:

[main]
plugins=ifupdown,keyfile

[ifupdown]
managed=true

[device]
wifi.scan-rand-mac-address=no

nmcli:

eno1: connected to Wired connection 1
        "Intel Ethernet"
        ethernet (e1000e), 18:60:24:8B:FE:32, hw, mtu 1500
        ip4 default, ip6 default
        inet6 2a0c:5bc0:40:1028:4597:f3aa:b00c:62bb/64
        inet6 2a0c:5bc0:40:1028:60f4:f459:9371:5e6e/64
        inet6 2a0c:5bc0:40:1028:df60:8e5c:3fb0:a0dd/64
        inet6 fe80::896d:d145:fe49:db08/64
        route6 2a0c:5bc0:40:1028::/64
        route6 ::/0
        route6 ff00::/8
        route6 fe80::/64

lo: unmanaged
        "lo"
        loopback (unknown), 00:00:00:00:00:00, sw, mtu 65536

EDIT

I set managed=false in /etc/NetworkManager/NetworkManager.conf and reboot. This is the output of some commands when the connection is working:

cat /etc/network/interfaces:

# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback

sudo lshw -C network:

  *-network                 
       description: Ethernet interface
       product: Ethernet Connection (2) I218-LM
       vendor: Intel Corporation
       physical id: 19
       bus info: pci@0000:00:19.0
       logical name: eno1
       version: 05
       serial: 18:60:24:8b:fe:32
       size: 1Gbit/s
       capacity: 1Gbit/s
       width: 32 bits
       clock: 33MHz
       capabilities: pm msi bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=e1000e driverversion=3.2.6-k duplex=full firmware=0.1-4 ip=155.198.45.81 latency=0 link=yes multicast=yes port=twisted pair speed=1Gbit/s
       resources: irq:33 memory:f3100000-f311ffff memory:f313b000-f313bfff ioport:2040(size=32)

EDIT

These are the captures of the wired settings:

details tab identity tab IPv4 tab IPv6 tab

EDIT

This is the output of ls -al /etc/NetworkManager/system-connections/Wired*:

-rw------- 1 root root 261 Nov 16 16:06 '/etc/NetworkManager/system-connections/Wired connection 1.nmconnection'