Hello All
In a similar way I have a Shelly EM on a L+N installation (I measure both the 16A and 10A line). I installed the unit on the 08 July and all readings were positive. Few days after, all of a sudden, they both changed in negative (maintaining approx the same absolute readings). Few days later again the switched to positive and around one hour ago they became again negative.
I had no direct contact (physical or S/W) with the sensors or the unit and the only thing I did was to read values via WEB interface. I had it connected to Home Assistant till this early afternoon but today, when it got negative, it was disconnected (if that could be of any interest).
Any hint on where to look for the issue would be greatly appreciated.
This is unit is not (yet) connected to cloud.
Thanks in advance.