No ping to opnsense gateway after dual WAN setup

[salvador fx]

Facts:
- I setup dual WAN for loudbalance and failover (2 diferente ISP providers).
- Both ISPs (WANS) DHCP;
- Both ISPs (WANS) Modems are in bridge mode;
- Both ISPs (WANS) DHCP IPs apears as external IPs As WAN1/WAN2. Not internal IPs;
- I setup using the manual wi-ki from opnsense page;
- I have about 60 PCs on LAN and evething is working well;
- Default allow LAN to any rule -> changed gateway from Default to LoudbalaneGroup;
- Added a rule just above the default LAN allow rule to make sure traffic to and from the firewall on port 53 (DNS) is not going to be routed to the Gateway Group that i definned.
- Enabled Sticky Connections;
- Enabled Default Gateway Switching (i use unbound DNS);
- Loadbalance and failover ae working fine;
- All my about 60 machines i fix IPV4 DHCP Static Mappings and on each one put a ticket on (ARP Table Static Entry);
- All my about 60 machines have a fixed LAN IPs;
- All my about 60 machines are Win Servers 2016 R2
- Each one (60 Server2016) are individual AD/DC (each one are Active Directory/Domain Controller)
- Clients access my 60 Servers remotely with OpenVPN;

can someone help with:
When i change the Default allow LAN to any rule gateway from Default to LoudbalaneGroup everyting still working well, but internaly none PCs/Servers can ping the opnsense gateway 192.168.1.251
?? But i can ping each Server to any other one. Only OPNsense i cant ping.

At least everithing lokks working well, but,..

what could i did wrong?