I was reviewing the time off allocations of my employees and I found that I have issues with the Sick Leave allocations.

Yesterday I set a simple allocation of 30 days of sick leave with a validity period of 1 year (1/1/2023 to 31/12/2023) for an employee. However, after the allocation is approved, instead of showing "30 remaining out of 30 days", it is showing "29 remaining out of 30 days". Today when I check again, it said 28 remaining.  When I go into the employee's calendar, the missing balance turned into planned days even though the employee did not request any time off. 

This issue only happens to this particular leave allocation and I cannot seem to figure out why this is happening.

Any pointers will be great.

Thank you.