table cell containing formulas: display "problem"

[Vv69]

In a cad table, if a cell contains a formula (i.e. "=a3+a4") the cell is diplaied  with the background color "reversed".

That makes the cell content hard to read (at least for certain background colors).
When the table is printed there is not that "background reverse".
Is there a way to have the cell style not changed for cells that contain formulas ?
Thank you in advance