Direct Speech Line - Unespected conversation update event (and without locale property set)

Paolo Scomparin 51

Hi,

we are developing an multilangue bot thru Direct Speech Line channel.
We are using the default client: https://github.com/Azure-Samples/Cognitive-Services-Voice-Assistant/tree/main/clients/csharp-wpf

We note two strange beheaviors of the channel:

1) when the event ConversationUpdate is fired (at start of connection) the Bot not recognize the language that are set in the client, after the first message sended to the bot, the next messages are correctly localized. The problem is similar as this webchat channel issue --> https://github.com/microsoft/BotFramework-Composer/issues/8659

2) During the conversation the channel fire a ConversationUpdate (we don't understand why) also after few messages , also if a bot waits for a response (prompt question) from the user. Could be correct that the event ConversationUpdate fire due inactivity of the user, but not if there is an interaction going on.
This problem with the issiue of point 1) generate a situation like this:

client set in it-IT
(for convenience a write the message always in english, please refer to language code noted at the end of each sentence)

Channel: <ConversationUpdate >
Bot: hello [en-us] <-- the first one after the connection is always in english

... some interactions with the bot ...

User: let's check the weather [it-it]
Bot: Tell me the me your postal code [it-it]

Channel:<ConversationUpdate > <-- why happend ?

Bot: Tell me the me your postal code [en-us]
User: 123456
Bot: The wheather in your city is sunny [it-IT]

romungi-MSFT 41,961 Reputation points Microsoft Employee

2022-05-13T07:53:49.803+00:00
@Paolo Scomparin Based on the information available on this page, I think the following could be the causes of this behavior, specifically if you are not using user ID in the token the second update might have been sent by the channel.

If the token contains user ID ("dl_xxxxx"), then, Direct Line will send 1 conversationUpdate event with 2 membersAdded. Ref.

If the token does not contain user ID, then, Direct Line will send 1 conversationUpdate (membersAdded for bot). When the user says "Hi", another conversationUpdate (membersAdded for user) will be sent.
Paolo Scomparin 51 Reputation points

2022-05-13T10:09:27.553+00:00

@romungi-MSFT thank for the response.

We are using wpf c # client with user_id set (it shouldn't change) and also in a direct speech line connection it is unlikely that more than one user is connect to the bot per same conversation (i think the client or the channel genreate a new
coversation id each time).
Paolo Scomparin 51 Reputation points

2022-05-16T08:00:00.93+00:00
I would add other some indications for help to understand the problem:

the conversation update event seems occurred with the interval of ~ 5 minutes during the interaction with user, also if the bot wait an a response from the user.

we tried to log the activity of the event with ApplicationInsight, but there'isnt a detail o motivation in the paylod on why it's fired.

More generally, there isn't much documentation on Direct Speech Line