Bad "Calibrated Reference Consumption" w/.Confidence 0% except for low speed

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My custom app is posting to the Telemetry API and while it is giving me correct trip history speeds, locations, SoC's and consumption values, the Calibrated Reference Consumption value is much too high, though the Confidence graph is showing 0% for Medium Speed and High Speed (45% so far for Low Speed). My speeds have been wide ranging, a good sampling between 0 and 80 mph (130 km/h)

It's not clear to me what might the problem could be for the Calibrated Reference Consumption, appreciate any advice.