Issue while doing wallet payment

Suppose the pruduct is of ₹899 and wallet money is also ₹899. Then the customer is not able to make a purchase and on selecting wallet payment the site is doing weird things.

Here is the video so that you can understand it better- https://drive.google.com/file/d/1rgo0AnOZNUPVL5e7OIvKDOqOZ3EAM_p6/view?usp=sharing