Wake on LAN broadcast port 9 issues

Does OpenWRT block port 9 or something? My old router had no issues with WOL, when I moved to OpenWRT I noticed all my WOL apps stopped working until I switched from broadcast port 9 to 7.

Now everything works, except apps that do not now allow you to set a broadcast port.

Blocked where?

Outbound, inbound or forwarded?

What interface?

Everything?

Is this software on the router, on the LAN, or intra-network (routed)?