Error while refreshing for new scenario (User Variable) in Flex Form

Summary

Error while refreshing for new scenario (User Variable) in Flex Form

Content

Hi All,

We are using User variable for Scenario in flex form rows, once the flex form is opened we are keeping manual formulas in flex form rows to get the accounts, Entity from different adhoc sheet (please note scenario UV also in rows along with Account , Entity) and refreshing the flex form , its working fine. when we change user variable from Forecast to Plan , its giving an error (Error is: Index:0,Size:0) 

FYI, we tried to keep Scenario User variable in flex form column, when we select new scenario in flex form the formulas are erasing which are in rows so trying by keeping scenario (UV) in row.