Locking the period in RC with TM and then running auto match in next period makes the data disappear

Summary:

We are doing Reconciliation compliance with Transaction Matching. After adding adjustments etc., we close the reconciliation for Nov month. There are few transactions that will match when we upload data for Dec. After closing the reconciliation, we lock the Nov period and then create the reconciliation and load data for Dec. After running the auto match for Dec, we observed that the unmatched transactions in November disappears even though they don't have matching transactions in December. It just turns blank and since the unmatched transactions disappears, it starts showing variance. This issue does not arises when we don't lock the