No Gateway statistics in Dashboard

I have some GWs based on modified Semtech Packet Forwarder (not ours).
If GWs send UDP to Chirpstack ver.4.2.0-test.1, statistics fine
If GWs send UDP to Chirpstack ver.4.3.1 – no statistics
GWs worked fine
GatewayBridge is same in both cases

Ours GW based on actual Semtech Packet Forwarder have statistics in Chirpstack 4.3.1, but I can’t modify any software modules in “not ours” GWs

What is wrong?