I had good feedback on the FR forum “LesImprimantes3D” It’s related to the filling of the part (probably), the patern and the same as the holes in the grid when I look at my defects and my filling, attached my filling at 15%.
You can see that this is identical to the position of the void in my grids. To solve the problem I have to increase the filling, strange that the slicer did not see the thing coming.