How to prevent potential duplicate expense items, when the expense dates are overlapped?

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We enabled the "Detection of Duplicate Expenses" features in expenses Opt-In.

Expense Item1: 08/15/21 to 08/16/21
Expense Item2: 08/16/21 to 08/17/21

Expected Restriction for 08/16/21 Meals - Full Day

But the system is not restricting/validating when the dates are over-lapped, any inputs to restrict this case, please!