We've seen an issue where the merchant category code for a transaction is a value that's out of spec:
The spec expects an optional string with the validation 'Min3Max4Text'.
We've seen multiple cases of this within the results for a single user.
The interaction-id is: bdc30f58-e7c7-4e8c-8657-bf3fb7bfeeee, and the timestamp is: Fri, 27 Sep 2019 12:47:43 GMT.
Please let me know if there's anything else you need to help track down the issue.