Payment Options Unavailable With Category Discount Code?

So I have setup a discount code to only work on a certain range of products (based on IN category) and have been alerted to an issue. For some reason all billing options vanish once entering!?!?

The cart gives the message the discount is applied which only works on the right products but once I remove this criteria the payment options show back up again. ???

please provide FTP access for us to check issue

Try to clear cache at first. If this does not help, we are ready to examine the issue on your server