We are experiment on severals wireless cpes, the missing wireless interface in our bridges.
Using the CPE in station-bridge and using a bridge like:
/interface bridge
add fast-forward=no name=bridge1 protocol-mode=none
/interface bridge port
add bridge=bridge1 hw=no interface=ether1
add bridge=bridge1 interface=wlan2
After some power outages, we got a missing wireless interface on the bridge.