ZeroTier strange behavior advice needed

[Novodk]

We have a LM at a customer where the KNX installation have 2 lines:
Router 192.168.1.1
LM = 0.0.255 IP: 192.168.1.2 Subnet: 255.255.0 Gateway: 192.168.1.1
IP Router 1: 1.1.0 IP: 192.168.1.3 Subnet: 255.255.255.0 Gateway: 192.168.1.1
IP Router 2: 1.2.0 IP: 192.168.1.4 Subnet: 255.255.255.0 Gateway: 192.168.1.1


When I'm on site and connected to the network everything works as expected.
But when I connect over ZeroTier and scan line 1.1 I only get around half the components!
I even made a new ZeroTier network where I only have the LM and my computer in, still doesn't work

Strange thing is that I can´t see/ping the IP router on line 1!

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Any advice?