Problem With Lemon Squeezy CC payments

Tried to purchase the 20% off special on Highend Pro. Two separate credit cards were rejected (but they work with all my other purchases online today). After the second rejection I decided to give up on the purchase, as it appeared their CC payment system was malfunctioning. There was still ~2 hours left on the 20% offer. I might consider it again (with the same discount), but it seems it’s not going to be possible again with Lemon Squeezy, Inc, unless they change something on their site.
Mark.stappenbeck@magrants.org