CO2 AQE v2 Reporting Constant Nonzero Value

I've got a CO2 egg that has worked great for ~2 months now, but the past few days it has been broadcasting a constant nonzero value. Any thoughts? Image below shows the sensor flat line at ~830 ppm.

Power cycling the egg has not resolved the issue.

First instinct is a sensor hardware problem.

Image may be NSFW.
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Thanks!