Nebula 19.10 - Topology error

Hello everyone,

I have this issue:

As you can see I have 7 devices that (looking at the Topology graph) seem to be linked directly to the firewall while they are connected to switch2 that you can see below.

I have the firewall -> first poe fiber switch1 to APs and double DACs to switch2 -> switch2 for everything else.

All the network is based on 13 Zyxel devices, no other brands in the middle:

How can I solve that?