Unexplained transaction's cost date moves into subsequent period

Summary:

We are observing some scenarios where for a transaction happening on P-10, cost date moves to P-11. Our Cost Profile allows negative transactions and uses FIFO. We have Perpetual Average as cost. Secondly we do not allow Negative On hand and negative balances at Inventory Level. We have a very simple set up with one sub inventory per inventory. We have an integration where a file comes an external system and the integration creates Cycle Count Adjustments. I would like to know how Oracle cloud behaves in all the following circumstances. Lets take this example to better understand the issue.