i have setup opnsense in hyper V acting as Transparent Filtering Bridge "B-Router".
everything is working fine, when enabling netflow i loss network connection, everything goes down, there is no traffic downstream of the opnsense.
i have to disable the option and restart the opnsense again. how i can solve this issue, i need to export netflow to external app!
for those who face the same issue, i have managed to fix it.
at first you required to enable Promiscuous mode and then select all interfaces that you would like to monitor in Listening interfaces, select the bridge interface in the WAN interfaces option (NetFlow).
everything will work fine.