B2B Portal: Split payment with credit & card

It's great that customers are now able to use any store credit they have to pay for orders. The only downside is that instead of prompting them to immediately pay for the remaining amount on an order, it just sends them an invoice to pay later. We are currently trying to eliminate the 'pay later' option as it's risky with clients that have a habit of not paying their invoices on time. It would be better if when clients use their credit, their order total would be adjusted and they would be prompted to pay for the remaining amount via stripe or another payment method.