If you make a mistake when typing a credit card number into a client profile (to store it as a payment method), the backspace key does not take you out of the current group of 4 digits. So if I type "6012" instead of "6011" and need to correct the last digit to 1, I have to take my hands off the keyboard, click beside the 2, then backspace, then type the correct number.

It would be appreciated if the backspace key worked as usual since it is annoying to customers when I have to stop them from reading their card number because of an easily fixed mistake that is hampered by the backspace not working.