I have similar problems. When try to participate in multiplayer session, garage loads, other cars load and I see message "Connection lost" and game disconnects. I have no issues with CS Rookie practice server, yesterday i have connected to S397 BTCC server, but today fail. My network connection is fiber 500Mb/s download, 50Mb/s upload and ping 5 m/s when server is near(I'm from Poland), about 30-50 m/s for servers in Europe. Noticed that I have high ping 120-200 m/s when connecting to servers in US and Asia, and very high about 400 when connecting to AWS servers. This problem starts with latest update v1128. I even try to install other game like CS:GO, and there I have no problem with connecting to server, and ping on Europe servers is about 50.