Cancellation of Unbudgeted PR

'If there is unbudgeted PR raised in previous year, the encumbrance will be carried to the next year together with budget to avoid reduction of current year budget.  However, if the requestor cancel the PR, the encumbrance will be cancelled but the budget still there. (means become more budget in current year)

Is this a standard feature? where cancellation of PR's will reversed deductions from the budget