Before update:

# wicked show br0
br0             up
      link:     #5, state up, mtu 1500
      type:     bridge
      config:   compat:suse:/etc/sysconfig/network/ifcfg-br0
      leases:   ipv4 dhcp granted
      leases:   ipv6 dhcp granted
      addr:     ipv4 10.160.4.0/16 [dhcp]
      addr:     ipv6 2620:113:80c0:8080:10:160:4:0/64 [dhcp]
      addr:     ipv6 2620:113:80c0:8080:92b1:1cff:fe69:ddc/64
      route:    ipv4 default via 10.160.255.254
      route:    ipv6 default via fe80::1

After update:

# wicked show br0                     
br0             up
      link:     #5, state up, mtu 1500
      type:     bridge
      config:   compat:/etc/sysconfig/network/ifcfg-br0
      addr:     ipv4 10.160.4.0/16
      addr:     ipv6 2620:113:80c0:8080:10:160:4:0/64
      addr:     ipv6 2620:113:80c0:8080:92b1:1cff:fe69:ddc/64
      route:    ipv4 default via 10.160.255.254
      route:    ipv6 default via fe80::1

Note how [dhcp] is missing.  Also in the logs:

wickedd-dhcp4[1272]: ni_dhcp4_device_close: timer active for br0
wickedd-dhcp6[1271]: br0: timer active while close, disarming

Eventually the DHCP-configured IPv6 address will be dropped and network
connectivity is lost.