I had a Dynatrace Managed deployment for a customer and LiveChat would to need go through Squid Proxy. As it seem Dynatrace LiveChat (intercom.io) would established Websocket whenever there's LiveChat conversation. The reason why it does not refresh is due to fact that WebSocket was not established.
Hence, according to customer CCoE that Dynatrace LiveChat (intercom.io) when establishing a WebSocket, it did not include Upgrade and Connect http headers when it tries to established WebSocket connection in order for the Squid proxy to form the Websocket connection. Is it correct ?