I know when it happened on my card I was surprised to see it as well, however in my case the credit and debits all went in and out on the same day so I'm assuming there would be no additional interest charge(albeit I'll be checking this later on in the month). If there is no customer impact, why contact the regualtor.?
It wasn't communicated very well by UB,and given that they have to recall a lot of the new credit cards they've issued as well, since the chip is in the wrong place, they seem to have made a complete horses rear end of all of this