Item Interest being calculated during blocked period dates

Hello Colleagues,

We have a business scenario where Item interest must only be calculated for 9 months within a year (i.e. within a 12 month period).

Therefore we built an enhancement that placed a future-dated Interest Lock (Start date = 9 months from date of placement of Interest Key on open item).

Lock duration = 3 months.

However, when interest is calculated after the 3 month block is expired, the interest calculation includes the days when the block was in effect.

This doesn't meet the stated business requirement.

Is this this how standard FICA item interest calculation is meant to work?

Regardless, please share any suggestions to help overcome this.

Thanks in advance for your help.

Regards,

Ivor Martin