How to stop accrual recalculation after absence approval

Summary:

Periodic accrual recalculates after absence approval

Content (please ensure you mask any confidential information):

Hello, I have a problem with accruals being reset after an absence is submitted and approved. I have a monthly absence accrual plan but have run it from January to December. Now I noticed that when I apply for a leave in for example July, after it is approved, accruals are now reset to only from January to June. The remaining months, July to December then show a periodic accrual of zero in the database and do not even show in the front end.
Has anyone come across this problem and how to solve it?