The UBS Website delivers the following Information for the Credit Cards:
For every Credit Card-Account the belonging Credit Cards are listed separately now.

Therefore please update the Configuration in the Settings:
Settings > select the UBS Credentials > Update Configuration

The 'old' Credit Card Account will be deactivated and for every Credit Card, that belongs to this Account, a Credit Card will be shown in your Account List. Every Card has it's own Balance and its own Transactions.