Magento 2 Decline message disappears quickly in the Checkout page when placing the order using a credit card.
/vendor/magento/module-ui/view/frontend/web/js/view/messages.js
this seems to be a known issue and was affecting me as well (on Magento 2.2.5). There is a fix here which seems to work (message remains visible for longer) only that it scrolls up for the first error only. It does not scroll up for consecutive errors.
