Some merchant names seem to have incorrect escaping on new lines so you just get a backslash, I’m guessing it’s a badly decoded \n.
Seems to be a mistake in the /n for a line break. Simple enough to fix. i’m sure it will be fixed in the next update
Nope, that’s not us! If you hit “Something looks wrong” and correct the transaction details, we’ll fix it on our end 
That’s coming directly from Mastercard unfortunately!