When trying to remove trx defaults against Sub– item, system is not deleting last line of Default

When trying to remove transaction defaults against (Redwood page) Sub inventory – item, system is not deleting last line of Default.

ex.

item with multiple transaction types,

step1. select all and delete. Only 1st line gets deleted.

step2. Requery same item, select multiple lines except last one, here all lines gets deleted.

Step3. requery Same item, here only one line appeared on .. this line wont deleted.

ex.

also, created new role for Duty - Role CodeORA_INV_CONFIGURE_ITEM_TRANSACTION_DEFAULTS_PWA_DUTY_HCM,

even though, system is not supporting.

Appreciate your quick response for the same.

Thanks,

Ashoka