Fix TLS Websockets clients not receiving messages.

This can occurs after one client takes over a previous connection.

Closes #1489. Thanks to Bas Verhoeven.

ChangeLog.txt

@@ -13,6 +13,8 @@ Broker:
   restored from persistence. Closes #1464.
 - Fix messages with an expiry interval being sent without an expiry interval
   property just before they were expired. Closes #1464.
+- Fix TLS Websockets clients not receiving messages after taking over a
+  previous connection. Closes #1489.
 
 Client library:
 - Fix publish properties not being passed to on_message_v5 callback for QoS 2

src/handle_connect.c

@@ -160,6 +160,9 @@ int connect__on_authorised(struct mosquitto_db *db, struct mosquitto *context, v
 			}
 		}
 
+		if(context->clean_start == true){
+			sub__clean_session(db, found_context);
+		}
 		session_expiry__remove(found_context);
 		will_delay__remove(found_context);
 		will__clear(found_context);