hello Vema,
This was a known issue in earlier versions of Helical Insight.
• During Drill Through, not all selected dimensions were being passed correctly to the child report. For example:
• • booking_platform was getting filtered correctly
• mode_of_payment was not being applied as a filter in the child report

Resolution
This issue has been resolved starting from Helical Insight 6.0.1.
• From version 6.0.1 onwards:
• All selected dimensions (such as booking_platform and mode_of_payment) are correctly passed during Drill Through
• The child report receives and applies all relevant filters properly
• Upgrading to version 6.0.1 or above will resolve this issue.

For more information about drill through in helical insights open-source BI tool please go through the below blog.
Thanks,
Helical Insight.