Teams notification preview (Summary)

Hi,

We have a chatbot, in which we changed the content of Teams notifications preview "Sent a card" by a custom text (ex: "Hello everyone"), using the BotFramework reply.Summary property.

But since some weeks ago, that feature doesn't work anymore. The message "Sent a card" is displayed instead :

Does anyone have the same issue ? If yes, did you fix it ?

Thanks in advance !