"Calibrated reference consumption" approaches zero.

Hello. I have been using ABRP with two Smart’s for some time now. Both vehicles are equipped with an OVMS dongle, through which I have established a live connection to ABRP via a plugin. The data is indeed being transmitted. However, what isn't working is the "Calibrated Reference Consumption"—it keeps dropping back down to zero (2 Wh/km). This is happening with both cars. I have no idea what might be causing this. Can anyone help me?