Drill Down and customer Exit variable

Hello together and A Happy New Year!

Please help me with the following topic:

I have a query with 4 selections(fields) in the columns.

In the first selection (F1) I have resctricion to Posting Period via Period to (a user entry variable).

In F2 I have restriction to Posting Period via Period to cust (customer exit based on value of V1 - introduced by the user)

In F3 I have restriction to PP via Period from, Period to (between: user entry variables)

In F4 restriction to PP fia Period from cust, Period to cust (between: customer exit variables)

In the query, if I select in the selection screen Period from 1 and Period to 3, for example, when I make the drill down, only 3 (Period to) is displayed instead of 1, 2 and 3.

If in the query designer I remove from the columns F1 and F2, then the drill down is working properly (having intervals in the other fields: F3 and F4).

Do you have any idea why drill down is not working properly with all 4 fields in the columns?

Thank you,

Iuliana