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Swarm Overlay network: receiving ping replies from random ips

Hello I am running a docker swarm on 3 nodes with all containers attached to a networked called bf_net.

On the bf_net there are currently 11 containers attached.

On manager --> “docker network inspect bf_net” gives containers with the following ips

10.0.0.41
10.0.0.46
10.0.0.54
10.0.0.38
10.0.0.44
10.0.0.48

On worker1 --> “docker network inspect bf_net” gives containers with the following ips
10.0.0.52
10.0.0.40

On worker2 --> “docker network inspect bf_net” gives containers with the following ips
10.0.0.50
10.0.0.53
10.0.0.42

For some reason I can ping 10.0.0.43 and many other non existent addreses from one of the containers and actually take replies.

Am I missing something here?

Docker version 18.06.1-ce, build e68fc7a215d7133c34aa18e3b72b4a21fd0c6136
Centos 7