I have created a chatbot with bot url(API Gateway API using a lambda function). Response messages/cards are correctly returned to the bot. But today response messages are working as expected but suddenly cards are not showing up in the response to Bot , its blank (API logs are fine, I can see that api has returned the card ).
After a while I am able to see the response cards are showing up for the previous requests also.
After refreshing chatbot page, the response cards renders properly