For now I've solved this using a copy of the EventSource webblock with an extra parameter, IsLoadingScreen (set by IsLoadingScneen()) and wrapping the last Container on the screen, that initializes the SSE Connection, in an IF.  When the webblock is being refreshed, IsLoadingScreen is false and no new, extra connection will be initialized.

Hi Lennart!

I tried to replicate your scenario but I may be missing something - I expanded the Demo App - Traditional_Chat_Web with another screen that has a WebBlock with the SSE. There's a button that triggers an ajax refresh and then I'm using the chat app screen to send messages.

With this setup I am unable to get the duplicate you mention:

Are you able to replicate on this setup on this app? Follows the .oap attached.

Hi Nuno,

Thanks for your response.
I noticed that you had set the On Click method of the Ajax Refresh button to 'Submit' instead of 'Ajax Submit'
After I had changed this, I could reproduce the issue. At first there's one eventsource listener for 'chat':

After refreshing there are 2, which also results in duplicated messages on the screen:

With 2 results. I have added an expression to WebScreen1 to show the incoming messages:

As I said, for now I'm using a copy of the EventSource webblock, but it would be nice to be able to use the forge component.

Regards,
Lennart

Hi Lennart, 

Sorry this took me awhile, there's a new release of the traditional client up that should have this issue fixed. 

Let me know if this is working properly when you can find some time.

Thanks