Promotion Auto Disable After User Purchased

im facing promotion auto disable issue
after purchase
when user enter promo code and check out with payment
the promotion auto disable and the condition promo code become empty.

if they use offline purchase, it doesnt affect the promotion to become disable.

when user use online payment gateway, after they make the payment, the promotion become disable, and the condition promo code equal to empty.

Thank You

It is require to examine issue on you server. I have not heard anything about such bug in CS-Cart. Possibly CS-Cart team will answer something here

That would be very odd for a customer action to go change an administrative setting.... Do you have any 3rd party addons that do anything with promotions or making special deals?