network bridge renamed at boot

Hello,

one bridge interface from the server gets renamed at boot to renamed4, and the bridge is not working anymore.

My configuration is:

==========
# lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 18.04.1 LTS
Release: 18.04
Codename: bionic

==========
# uname -a
Linux ve1 4.15.0-36-generic #39-Ubuntu SMP Mon Sep 24 16:19:09 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

==========
# lspci -nn -v -t
-[0000:00]-+-00.0 Intel Corporation Xeon E3-1200 v2/3rd Gen Core processor DRAM Controller [8086:0150]
           +-01.0-[01]--+-00.0 Advanced Micro Devices, Inc. [AMD/ATI] Curacao XT / Trinidad XT [Radeon R7 370 / R9 270X/370X] [1002:6810]
           | \-00.1 Advanced Micro Devices, Inc. [AMD/ATI] Cape Verde/Pitcairn HDMI Audio [Radeon HD 7700/7800 Series] [1002:aab0]
           +-02.0 Intel Corporation Xeon E3-1200 v2/3rd Gen Core processor Graphics Controller [8086:0162]
           +-14.0 Intel Corporation 7 Series/C210 Series Chipset Family USB xHCI Host Controller [8086:1e31]
           +-16.0 Intel Corporation 7 Series/C216 Chipset Family MEI Controller #1 [8086:1e3a]
           +-16.3 Intel Corporation 7 Series/C210 Series Chipset Family KT Controller [8086:1e3d]
           +-19.0 Intel Corporation 82579LM Gigabit Network Connection [8086:1502]
           +-1a.0 Intel Corporation 7 Series/C216 Chipset Family USB Enhanced Host Controller #2 [8086:1e2d]
           +-1b.0 Intel Corporation 7 Series/C216 Chipset Family High Definition Audio Controller [8086:1e20]
           +-1c.0-[02]----00.0 LSI Logic / Symbios Logic SAS1068E PCI-Express Fusion-MPT SAS [1000:0058]
           +-1c.6-[03]----00.0 Intel Corporation 82574L Gigabit Network Connection [8086:10d3]
           +-1d.0 Intel Corporation 7 Series/C216 Chipset Family USB Enhanced Host Controller #1 [8086:1e26]
           +-1e.0-[04]--
           +-1f.0 Intel Corporation Q77 Express Chipset LPC Controller [8086:1e47]
           +-1f.2 Intel Corporation 7 Series/C210 Series Chipset Family 6-port SATA Controller [AHCI mode] [8086:1e02]
           \-1f.3 Intel Corporation 7 Series/C216 Chipset Family SMBus Controller [8086:1e22]

==========
# cat /etc/network/interfaces
# interfaces(5) file used by ifup(8) and ifdown(8)
# Include files from /etc/network/interfaces.d:
source-directory /etc/network/interfaces.d

auto lo
iface lo inet loopback

auto eno1
iface eno1 inet manual

auto eno2
iface eno2 inet manual

auto brwan
iface brwan inet manual
        bridge_ports eno1
        bridge_stp off
        bridge_fd 0
        bridge_maxwait 5

auto brlan
iface brlan inet static
        address 192.168.50.5/24
        gateway 192.168.50.1
        bridge_ports eno2
        bridge_stp off
        bridge_fd 0
        bridge_maxwait 3
        dns-nameservers 192.168.50.1

==========
# cat boot.log
Oct 16 05:24:28 kernel: e1000e: Intel(R) PRO/1000 Network Driver - 3.2.6-k
Oct 16 05:24:28 kernel: e1000e: Copyright(c) 1999 - 2015 Intel Corporation.
Oct 16 05:24:28 kernel: e1000e 0000:00:19.0: Interrupt Throttling Rate (ints/sec) set to dynamic conservative mode
Oct 16 05:24:28 kernel: e1000e 0000:00:19.0 0000:00:19.0 (uninitialized): registered PHC clock
Oct 16 05:24:28 kernel: e1000e 0000:00:19.0 eth0: (PCI Express:2.5GT/s:Width x1) e8:40:f2:ec:90:70
Oct 16 05:24:28 kernel: e1000e 0000:00:19.0 eth0: Intel(R) PRO/1000 Network Connection
Oct 16 05:24:28 kernel: e1000e 0000:00:19.0 eth0: MAC: 10, PHY: 11, PBA No: FFFFFF-0FF
Oct 16 05:24:28 kernel: e1000e 0000:03:00.0: Disabling ASPM L1
Oct 16 05:24:28 kernel: e1000e 0000:03:00.0: can't disable ASPM; OS doesn't have ASPM control
Oct 16 05:24:28 kernel: e1000e 0000:03:00.0: Interrupt Throttling Rate (ints/sec) set to dynamic conservative mode
Oct 16 05:24:28 kernel: e1000e 0000:03:00.0 0000:03:00.0 (uninitialized): registered PHC clock
Oct 16 05:24:28 kernel: e1000e 0000:03:00.0 eth1: (PCI Express:2.5GT/s:Width x1) e8:40:f2:ec:90:72
Oct 16 05:24:28 kernel: e1000e 0000:03:00.0 eth1: Intel(R) PRO/1000 Network Connection
Oct 16 05:24:28 kernel: e1000e 0000:03:00.0 eth1: MAC: 3, PHY: 8, PBA No: FFFFFF-0FF
Oct 16 05:24:28 kernel: e1000e 0000:03:00.0 eno1: renamed from eth1
Oct 16 05:24:28 kernel: e1000e 0000:00:19.0 eno2: renamed from eth0
Oct 16 05:24:28 kernel: e1000e: eno1 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: Rx/Tx
Oct 16 05:24:28 kernel: e1000e: eno1 NIC Link is Down
Oct 16 05:24:28 systemd-modules-load[4449]: Inserted module 'vhost_net'
Oct 16 05:24:28 systemd[1]: Starting Network Service...
Oct 16 05:24:28 systemd-networkd[4822]: Enumeration completed
Oct 16 05:24:28 systemd[1]: Started Network Service.
Oct 16 05:24:28 systemd[1]: Starting Wait for Network to be Configured...
Oct 16 05:24:28 systemd-networkd-wait-online[4874]: ignoring: lo
Oct 16 05:24:28 systemd[1]: Started Wait for Network to be Configured.
Oct 16 05:24:28 systemd[1]: Found device 82579LM Gigabit Network Connection (Lewisville).
Oct 16 05:24:28 kernel: bridge: filtering via arp/ip/ip6tables is no longer available by default. Update your scripts to load br_netfilter if you need this.
Oct 16 05:24:28 kernel: brwan: port 1(eno1) entered blocking state
Oct 16 05:24:28 kernel: brwan: port 1(eno1) entered disabled state
Oct 16 05:24:28 kernel: device eno1 entered promiscuous mode
Oct 16 05:24:28 systemd[1]: Found device 82574L Gigabit Network Connection.
Oct 16 05:24:28 systemd-udevd[4752]: Could not set WakeOnLan of brwan to off: Operation not supported
Oct 16 05:24:28 kernel: rename4: renamed from brwan
Oct 16 05:24:28 systemd-networkd[4822]: brwan: Interface name change detected, brwan has been renamed to rename4.
Oct 16 05:24:30 systemd-networkd[4822]: eno1: Gained carrier
Oct 16 05:24:30 kernel: e1000e: eno1 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: Rx/Tx
Oct 16 05:25:29 systemd-udevd[4575]: seq 4153 '/devices/virtual/net/brwan' is taking a long time
Oct 16 05:25:58 systemd-udevd[4752]: error changing net interface name 'brwan' to 'eno1': File exists
Oct 16 05:25:58 systemd-udevd[4752]: could not rename interface '4' from 'brwan' to 'eno1': File exists
Oct 16 05:25:59 systemd[1]: Started ifup for eno1.
Oct 16 05:25:59 systemd[1]: Started ifup for eno2.
Oct 16 05:25:59 systemd[1]: Starting Raise network interfaces...
Oct 16 05:25:59 ifup[6838]: /sbin/ifup: waiting for lock on /run/network/ifstate.eno2
Oct 16 05:25:59 systemd-udevd[6919]: Could not generate persistent MAC address for brwan: No such file or directory
Oct 16 05:25:59 ifup[6838]: device eno1 is already a member of a bridge; can't enslave it to bridge brwan.
Oct 16 05:25:59 systemd-networkd[4822]: brwan: Gained carrier
Oct 16 05:25:59 ifup[6838]: Waiting for brwan to get ready (MAXWAIT is 5 seconds).
Oct 16 05:25:59 systemd[1]: Found device /sys/subsystem/net/devices/brwan.
Oct 16 05:25:59 systemd[1]: Started ifup for brwan.
Oct 16 05:25:59 sh[6961]: ifup: waiting for lock on /run/network/ifstate.brwan
Oct 16 05:25:59 sh[6961]: ifup: interface brwan already configured
Oct 16 05:25:59 systemd-udevd[7010]: Could not generate persistent MAC address for brlan: No such file or directory
Oct 16 05:25:59 kernel: brlan: port 1(eno2) entered blocking state
Oct 16 05:25:59 kernel: brlan: port 1(eno2) entered disabled state
Oct 16 05:25:59 kernel: device eno2 entered promiscuous mode
Oct 16 05:25:59 ifup[6838]: Waiting for brlan to get ready (MAXWAIT is 3 seconds).
Oct 16 05:25:59 systemd[1]: Found device /sys/subsystem/net/devices/brlan.
Oct 16 05:25:59 systemd[1]: Started ifup for brlan.
Oct 16 05:25:59 sh[7051]: ifup: waiting for lock on /run/network/ifstate.brlan
Oct 16 05:25:59 sh[7051]: ifup: interface brlan already configured
Oct 16 05:25:59 systemd[1]: Started Raise network interfaces.
Oct 16 05:25:59 systemd[1]: Reached target Network.
Oct 16 05:25:59 systemd[1]: Reached target Network is Online.
Oct 16 05:25:59 systemd[1]: Starting Dispatcher daemon for systemd-networkd...

Thank you.