Order Not CHanging from Pending Payment to Cancelled

We have a multi-site set up and only one of our many stores using this gateway is having an issue where an order is not changing statuses from Pending Payment to Cancelled.

There are 5 orders from last week stuck in Pending Payment status. 4 of them have only “The card was declined.” message in the Order Notes, several of them multiple times.

1 of them first had the declined message followed by two “An error occurred while processing the card.” errors.

I looked at cancelled orders from the past and they all switched automatically to the Cancelled status when a card was declined or the wrong credit card number was entered. We haven’t installed any new plugins since then and I cannot figure out what else would be going on that orders for this one store are no longer automatically switching to the Cancelled status.