No negative cost in Energy Tab

No matter how much energy my solar panels generate, the Energy Tab never shows negative costs, although the total energy from the grid is clearly negative. Not even using fixed prices. Has anybody seen negative costs?

FYI

This is the screen I am referring to:
Maybe the blue costs reflects the blue energy, so 5,5 kWh costs €1,57?

I think so, indeed. Homey does not currently include any reimbursement you get for delivering energy to the grid. So the currency value relates only to the energy you have obtained (purchased) from the grid.

I will report it Athom, it does not look like a complex thing to do.