Delete Business Rule not working - Multiple delete

[Shanmuganathan2]

Hi,

As per our requirement, we need to update a custom field which represents 'total hours' in parent (time_sheet) record, whenever a child (time_card) record is deleted. And when all records in the time_card table is deleted, we should show an error message and delete the associated time_sheet as well. 

We have written a Business Rule which runs on delete of any record in time_card table which calculates the remaining time and update the time_sheet record or delete it. 

This works fine, when we delete one record at once, but fails when we delete multiple record at once from related list.

I have tried changing it to before BR and async BR, but no luck. Can someone please let me know, if we have a fix for this?

Thanks!