Hi,
Some servers might have problems coping with the amount of async request made from the order overview if you are showing a lot of orders per page in there.
In v 4.9.0 which is on the steps the async requests have been removed and has been switched out with synchronous requests on the order view generation. It is combined with a cache mechanism to prevent overload.
Until its release, you may benefit from disabling the transaction information from the QuickPay plugin settings.
I’ve updated the plugin, however, now my order view shows an image of either visa or mastercard way bigger than usual.
It sounds like your browser is not loading the stylesheets properly. Try flushing any WP/server cache and possibly a hard refresh in your browser.
My host still tells me that /wp-admin/admin-ajax.php?action=quickpay_get_transaction_information&quickpay-
transaction-id* is causing a lot of requests which are slowing down the site. The update only fixed the ‘internal server error’ issues, but not the excessive requests.
It sounds like you are not running the latest version of the plugin. Either that or if the static JS files are cached on your end.
V4.9.0 entirely removed the parts you mention, so there is nothing in the plugin making these requests anymore.
In case of a caching issue I just pushed v 4.9.1 which adds a specific plugin version query param to the static files to avoid caching problems on them.