Area calculation discrepancies from module slab to PLN file slab

[Rene Pahlavan]

There is a strange discrepancy from area calculations shown in the module slab and a copy of the same slab in the project file. How could this be happening? The discrepancy is not huge, but for contract documents it needs to be accurate. Can anyone explain where the missing area is going? Screen shots attached showing element info - area for the module slabs and the same slab copied in the project master file. Screenshots below.

Area shown for slab in module:

 

Area showing copy of slab. They should be the same!

More examples:

 

 

 

Operating system used: Mac Apple Silicon 14.6.1. Sonoma