LM not see old KNX sensors

[ikhy]

Yes, only LM does not receive telegrams, old controllers work. We have 3 lines in 1.1.0, 1.2.0, 1.3.0. The sensors that the LM sees are from lines 1 and 2. The LM is connected via IP, on the same network as the router and old controllers, multicast IP. It doesn't matter what mode is selected TP-UART / EIBnet IP Tunneling / EIBnet IP Routing - the LM receives telegrams only from these sensors.
This is so strange, could there be a problem with the LM version? Or are filters installed somewhere?
sorry for my bad English