Shopify POS and ATB debit cards

[SRSM]

My staff have been reporting that Shopify POS frequently stalls when a customer pays with ATB debit cards. In some cases ATB cards have caused our Wisepad card reader to disconnect entirely, and the staff are unable to reconnect it. This has been corroborated independently by staff in two separate stores located in different cities.

Has anyone else experienced this?