Testing use of Service Contract and Invoices from Work Tasks based on Cost Based Pricing  on our 24R1 SU12 version, and use of Merge By Sales Part does not work according to our expectations.

Is someone using a similar setup in newer versions?  

My expected result here would be 1 line with the total quantity and amount for my 8 personell lines 

I get the same result if I create the Invoice Preview with Group Level Work Order (2 extra lines due to the date used as filter in the first scenario) 

                                               Our Invoice Rule on the Service Line on the Service Contract