Salary Basis rate amount should change automatically based on grade change in Offer Page

Summary:

Dear All,

Salary Basic rate amount is deepening on Grade. Salary Basis rate amount should change automatically based on grade change or edit when they are in offer page itself. If recruiter is in offer page and back to assignment section and change the position, then rate amount in salary Basis needs to be change accordingly.
Currently recruiter must remove the salary basis, need to reselect again salary basis and after that value is coming accordingly in case of grade change.

Content (please ensure you mask any confidential information):

Grade TM0 Salary Rate will be 40. If Grade is TM1 rate will 47.5. First time we have selected TM0 in assignment section of offer page and 40 is coming in salary Basis and second time we just get into assignment section of Offer and edit the grade to TM0 to TM1 the Salary rate is not automatically change to 47.5. What we need to do change the salary basis blank or select other salary basis and then select current one, after that only 47.5 is coming. Can you guide me on this if anyone have an idea.