Temporary band-aid to address mesh [un]reliability after queue "fix" (#2588)

src/mesh/FloodingRouter.cpp

@@ -21,7 +21,12 @@ bool FloodingRouter::shouldFilterReceived(const meshtastic_MeshPacket *p)
 {
     if (wasSeenRecently(p)) { // Note: this will also add a recent packet record
         printPacket("Ignoring incoming msg, because we've already seen it", p);
-        Router::cancelSending(p->from, p->id); // cancel rebroadcast of this message *if* there was already one
+        if (config.device.role != meshtastic_Config_DeviceConfig_Role_ROUTER &&
+            config.device.role != meshtastic_Config_DeviceConfig_Role_ROUTER_CLIENT &&
+            config.device.role != meshtastic_Config_DeviceConfig_Role_REPEATER) {
+            // cancel rebroadcast of this message *if* there was already one, unless we're a router/repeater!
+            Router::cancelSending(p->from, p->id);
+        }
         return true;
     }