Open Enrollment new rates reflects old rates for Dental Basic Plan

We are facing an issue :

The issue is the dental employer rate was incorrect for the month of January, ( Life Event - Open as on 1.1.25). The employee rate was correct. Then, in February, the employer rate was correct on the benefits summary. The only life events that happened in January was a 1/1 open enrollment and a 1/2 Salary Change. For some, the salary change performed as expected and updated rates as of 1/3. However, on others, it did not update correctly until 2/1. We have looked at the rates table, effective date of rates, the plan types all trying to find a