Expenses Cash Advance level (EX Definition) vs EX Profile Cash Advance Level

Hello, we have a GL unit that has their Expenses Definition/Advance Options set to 'Allow Advance' with a max amount for BU set to 0.00.

The GL Unit only wants a specific set of employees to be able to submit Cash Advances, so in those employees Expenses Profile, they are setting the Cash Advance Level to Specific Amount with a numeric value entered.

The GL Unit is having issues with the employees with the Cash Advance Specific Amount selected in their EX profile being automatically set to 0.00 after an undefined period of time.

Is this happening due to the Expenses Definition