Client warning 'No valid topology'

[sgeisler]

When running the native client with the socks service provider I'm getting a lot of these warnings sometimes (not always, but many when it happens):

2020-09-18T13:37:58.748 WARN  client_core::client::real_messages_control::real_traffic_stream > No valid topology detected - won't send any loop cover message this time                                                                                    

and a few of these in between:

2020-09-18T13:37:58.595 WARN  client_core::client::cover_traffic_stream                       > No valid topology detected - won't send any loop cover message this time                                                                                    

Idk what triggers it, is this normal/ok? What's the cause?