Non-expired disappearing ECB

Extra bucks disappeared a week before expiration

I check my account every couple days. I had $16 expiring on 2/07. When I went to make a purchase, they were all gone!

I checked purchase history and there's nothing that shows anything weird or that they were spent. There was no activity between accumulating the points and going in to make a purchase today.

Luckily, I have them printed out. I will call on Monday. I'm just curious if anyone else had this problem.