Dates getting wiped from Service Plan line item

Hi All,

We are currently facing an issue in the dates management on the service contracts. When we create a service contract and without saving if we change start date at the header we come across the following issues

1) Date rule gets wipes out from the service contract items.

2) All the dates maintained at the service plan line item are empty.

Contract header and Contract item has the same custom date profile .

For the service plan line item its a standard date profile SRVPLAN.

It will  be helpful in getting some pointers towards the issue or if someone has faced similar problem before.

Regards

Sohit