This can happen if your service provider posts your new bill before your 2nd payment for the previous bill has been completed.

When your bill is submitted through Flex, your previous bill must be fully settled with Flex before a new bill can be processed.

Even though your previous bill has already been paid to your service provider in full, there is still a remaining balance owed to Flex until your 2nd payment is made.

Until that balance is resolved, Flex cannot process your new bill.

What you need to do

Complete your 2nd payment in the Flex app.

Once your 2nd payment is successfully processed, your new bill can be submitted through Flex.