Data integration for transaction matching exports successfully, but no data is pushed into account

Hi,

We have a few file-based data integrations that are showing as successful data loads in Data Exchange, including a full import/validate/export process. But, no data is actually pushed into the transaction matching account associated with the integrations. The integrations used to work properly, but for some reason are not anymore. The file log does not point to any specific errors. Has anyone seen something similar before?