Amazon Lex Bots not recognising intents that have 'card groups' set up within them when input mode is chat

Hi

I am creating a chat only bot and wanted to use the 'card groups' functionality within the intents. However, I have noticed that when testing the chatbot on my dev site, if I try to invoke any intents with a card group within it, then the journey just follows the fallbackintent.

Can anyone kindly shed any light on why this may be occurring?

Note that everything renders fine on the test facility within lex itself - its only on the 'test chat' bit on connect and on my actual dev website that the issue occurs.

I also added a voice pathway to the same journey and that works fine...

I'm wondering if there may be some adjustments needed to the chat widget script to accomodate for the card groups but I'm really not sure an open to any suggestions at all!

Any help would be much appreciated!

Thanks

Faizal