Network Manager doesn't set IP4 address and no default route on wired connection

I recently updated to LEAP 15.3. While the same hardware was working with LEAP 15.2, I now have the problem that when I use the KDE network manager with a wired connection, no IP4 address and no default route is set. WLAN connections work and the same hardware configuration works with wicked.
Here is the output of ip addr, link, route for wicked:

configuration with wicked

ip link

4: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP mode DEFAULT group default qlen 1000
link/ether 00:0e:c6:8e:e2:27 brd ff:ff:ff:ff:ff:ff
altname enp0s20f0u3

ip addr

4: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 00:0e:c6:8e:e2:27 brd ff:ff:ff:ff:ff:ff
altname enp0s20f0u3
inet 192.168.1.109/24 brd 192.168.1.255 scope global eth1
valid_lft forever preferred_lft forever
inet6 fe80::20e:c6ff:fe8e:e227/64 scope link
valid_lft forever preferred_lft forever

ip route

default via 192.168.1.254 dev eth1 proto dhcp
192.168.1.0/24 dev eth1 proto kernel scope link src 192.168.1.109

configuration with network manager

ip link

4: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP mode DEFAULT group default qlen 1000
link/ether 00:0e:c6:8e:e2:27 brd ff:ff:ff:ff:ff:ff
altname enp0s20f0u3

ip addr

4: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 00:0e:c6:8e:e2:27 brd ff:ff:ff:ff:ff:ff
altname enp0s20f0u3
inet6 2a02:a46a:e2b:1:c8d8:d5fd:10b:38d6/64 scope global temporary dynamic
valid_lft 259107sec preferred_lft 85833sec
inet6 2a02:a46a:e2b:1:2a63:3615:cf62:40c9/64 scope global dynamic mngtmpaddr noprefixroute
valid_lft 259107sec preferred_lft 172707sec
inet6 fe80::589c:6c5a:78c4:59af/64 scope link noprefixroute
valid_lft forever preferred_lft forever

ip route

<nothing>

Please use code tags: button #.

How did you configure NetworkManager for eth1?

Find which connection corresponds to eth1 using “nmcli connection show” and then please share (Using Code Tags Around Your Paste) the output for “nmcli connection show <connnection-name> | grep ipv4”