Weird MAC address after installing a snapshot for COMFAST CF-E375AC

Hi there,
I have 3 units of COMFAST CF-E375AC model and when I install the snapshot
the MAC address of the wireless radio for 5GHz assumes the value '12:34:56:78:90:12'.
The original firmware didn't show this kind of behavior. I'm wondering what could cause this.

Here's the output of my ifconfig after turning both wireless interfaces on

root@OpenWrt:~# ifconfig
br-lan    Link encap:Ethernet  HWaddr 40:A5:EF:xx:xx:xx
          inet addr:192.168.1.1  Bcast:192.168.1.255  Mask:255.255.255.0
          inet6 addr: fd90:688b:fbd9::1/60 Scope:Global
          inet6 addr: fe80::42a5:efff:fe64:6ec2/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:8760 errors:0 dropped:0 overruns:0 frame:0
          TX packets:7760 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:763742 (745.8 KiB)  TX bytes:804254 (785.4 KiB)

eth0      Link encap:Ethernet  HWaddr 40:A5:EF:xx:xx:xx
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:6724 errors:0 dropped:0 overruns:0 frame:0
          TX packets:6203 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:695135 (678.8 KiB)  TX bytes:667073 (651.4 KiB)
          Interrupt:5

eth1      Link encap:Ethernet  HWaddr 40:A5:EF:xx:xx:xx 
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
          Interrupt:4

lo        Link encap:Local Loopback 
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:585 errors:0 dropped:0 overruns:0 frame:0
          TX packets:585 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1
          RX bytes:40028 (39.0 KiB)  TX bytes:40028 (39.0 KiB)

wlan0     Link encap:Ethernet  HWaddr 12:34:56:78:90:12 
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

wlan1     Link encap:Ethernet  HWaddr 40:A5:EF:xx:xx:xx 
          inet6 addr: fe80::42a5:efff:fe64:6ec1/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:4 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 B)  TX bytes:440 (440.0 B)

I manually substitute the other macs with xx's

How should I proceed to fix this? Should I just wait for the stable release?

any thoughts?