Application of Discount Code results in crazy amounts, new discount codes do not work
I found this issue as regression to CiviDiscount ext due to CRM-21562 changes. Submitted a PR https://github.com/dlobo/org.civicrm.module.cividiscount/pull/190 against CiviDiscount ext. Can you please test this patch and if possible provide your feedback in the PR itself, that will be helpful in getting it merged?

Thanks!