When applying for store credit/custom fees(custom module) in one-page checkout in Magento 2. It gets applied correctly on the grand total. But when pay using a payment gateway(razor pay), my store credit gets applied twice on that payment value.
Screenshot for store credit applied correctly on the grand total.
Screenshot for when pay using razor pay my grand total and payment total(store credit get applied twice) get different.
I followed this for reference link How to add fee to order totals in Magento 2
