Minor update to STOMP chapter

Issue: SPR-16681

src/docs/asciidoc/web/websocket.adoc

@@ -1929,9 +1929,10 @@ will typically notice the broker is not responding within 10 seconds. Clients ne
 implement their own reconnect logic.
 ====
 
-Furthermore, an application can directly intercept every incoming and outgoing message by
-registering a `ChannelInterceptor` on the respective message channel. For example
-to intercept inbound messages:
+The above events reflect points in the lifecycle of a STOMP connection. They're not meant
+to provide notification for every message sent from the client. Instead an application
+can register a `ChannelInterceptor` to intercept every incoming and outgoing STOMP message.
+For example to intercept inbound messages:
 
 [source,java,indent=0]
 [subs="verbatim,quotes"]
@@ -1947,8 +1948,7 @@ to intercept inbound messages:
 	}
 ----
 
-A custom `ChannelInterceptor` can extend the empty method base class
-`ChannelInterceptorAdapter` and use `StompHeaderAccessor` or `SimpMessageHeaderAccessor`
+A custom `ChannelInterceptor` can use `StompHeaderAccessor` or `SimpMessageHeaderAccessor`
 to access information about the message.
 
 [source,java,indent=0]
@@ -1966,6 +1966,12 @@ to access information about the message.
 	}
 ----
 
+Note that just like with the `SesionDisconnectEvent` above, a DISCONNECT message
+may have been sent from the client, or it may also be automatically generated when
+the WebSocket session is closed. In some cases an interceptor may intercept this
+message more than once per session. Components should be idempotent with regard to
+multiple disconnect events.
+
 
 
 [[websocket-stomp-client]]