Bounding box feature problem

Hi, i recently started using the bounding box feature to control part dimensions

in the BOM.

We have a woodwork in our company and we use cut plans to instruct

several workers, the dimensions in BOM help us through several stages

of the building process.

The wood parts are virtual and we do not code them, only sheet metal

and machined parts.

When the part becomes virtual this happens:

I manually have to enter the part and press "CTRL+S" to save it and them the dimensions appear again.

Anyone knows how to fix this?

Thanks in advance.

SolidworksDrawings And Detailing