NextPM lifetime

Thanks to @pjg I was able to run my Tera NextPM for almost exactly 6 months. For the past two days it just yields nonsense. Rebooting and leaving it unpowered for an hour did not help. Should it be beyond its lifetime?

I haven’t looked at the Tera NPM data for more than a year but felt curious a few days ago. Surprisingly the sensor has started to yield sensible output in August 2023. I didn’t not touch it in all those months (including the software).