Related objects, not refreshing when one is updated

We have two related objects. The parent (Monthly Timesheet) updates when a new child (Timesheet Record) is created or deleted but I want to be able to update the child and the parent refreshes/updates immediately when the child is saved.

I had this working via Property Calculator but since updating to 24.4.52 version of the application, I an struggling to fathom this out.

This is the current set up which works up until the Update Related Objects section

This shows the two property calculations

This is the Update Related Objects

I have tried multiple variations to this but when I update any of the four properties on the Timesheet Record, it does not update/refresh the Monthly Timesheet.

I've gone cross eyed now so would really appreciate any help.

Thanks in anticipation