LAN Bridge looses member Nic

[ArminF]

Hello all,

i did setup the LAN Bridge according to the docu below.
https://docs.opnsense.org/manual/how-tos/lan_bridge.html

Before
igb0 -> WAN
igb1 -> LAN
igb2 -> not used but setup while installation as opt1/2
igb3 -> not used but setup while installation as opt1/2

After
igb0 -> WAN
igb1,2,3 -> LAN Bridge

So far so good. All was running well. After a reboot igb1 (which was active on initial setup) decided not to work anymore. 

Disabled interface, took it out of the bridge and reversed the action.
Bridge is working fine again.

I guess until next reboot.

Is there anything i can make this stable and fix the setup?
thank you very much!
A

Intel Networkcards

Details ifconfig
igb0: flags=28943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST,PPROMISC> metric 0 mtu 1500
   options=1400b8<VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,VLAN_HWTSO,NETMAP>
   ether 00:0e:c4:d1:c3:0d
   hwaddr 00:0e:c4:d1:c3:0d
   inet6 fe80::20e:c4ff:fed1:c30d%igb0 prefixlen 64 scopeid 0x1
   inet 87.102.237.37 netmask 0xfffffc00 broadcast 87.102.239.255
   nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
   media: Ethernet autoselect (1000baseT <full-duplex>)
   status: active
igb1: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric 0 mtu 1500
   options=1400b8<VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,VLAN_HWTSO,NETMAP>
   ether 00:0e:c4:d1:c3:0e
   hwaddr 00:0e:c4:d1:c3:0e
   inet6 fe80::20e:c4ff:fed1:c30e%igb1 prefixlen 64 scopeid 0x2
   nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
   media: Ethernet autoselect (100baseTX <full-duplex>)
   status: active
igb2: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric 0 mtu 1500
   options=1400b8<VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,VLAN_HWTSO,NETMAP>
   ether 00:0e:c4:d1:c3:0f
   hwaddr 00:0e:c4:d1:c3:0f
   inet6 fe80::20e:c4ff:fed1:c30f%igb2 prefixlen 64 scopeid 0x3
   nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
   media: Ethernet autoselect (1000baseT <full-duplex>)
   status: active
igb3: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric 0 mtu 1500
   options=1400b8<VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,VLAN_HWTSO,NETMAP>
   ether 00:0e:c4:d1:c3:10
   hwaddr 00:0e:c4:d1:c3:10
   inet6 fe80::20e:c4ff:fed1:c310%igb3 prefixlen 64 scopeid 0x4
   nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
   media: Ethernet autoselect (1000baseT <full-duplex>)
   status: active

bridge0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
   ether 02:3e:52:76:10:00
   inet 192.168.1.1 netmask 0xffffff00 broadcast 192.168.1.255
   nd6 options=1<PERFORMNUD>
   groups: bridge
   id 00:00:00:00:00:00 priority 32768 hellotime 2 fwddelay 15
   maxage 20 holdcnt 6 proto rstp maxaddr 2000 timeout 1200
   root id 00:00:00:00:00:00 priority 32768 ifcost 0 port 0
   member: igb3 flags=143<LEARNING,DISCOVER,AUTOEDGE,AUTOPTP>
           ifmaxaddr 0 port 4 priority 128 path cost 55
   member: igb2 flags=143<LEARNING,DISCOVER,AUTOEDGE,AUTOPTP>
           ifmaxaddr 0 port 3 priority 128 path cost 55
   member: igb1 flags=143<LEARNING,DISCOVER,AUTOEDGE,AUTOPTP>
           ifmaxaddr 0 port 2 priority 128 path cost 55