Powerfactor VM-3P75CT

Since the latest update of the VM-3P75CT, the power factor has become visible. I have noticed that this value appears unusually low in my measurements. In the situation below, it corresponds to the full feed-in from my SolarEdge inverter. However, it seems unlikely to me that this power would be fed into the grid almost entirely as reactive power. It is possible that I am not interpreting the displayed value correctly.

Is it correct that, during feed-in, an optimal power factor value is around –1?

I did notice some strange jumps today but did not take any screenshots unfortunately.
V1.11