How was your issue detected?:
By watching the lab part of web interface
Did you noticed any other signs of this issue around your home?:
When we moved in 4 years ago, as soon as we turn on eg 1200 watt convection oven in the kitchen, some of the lights in the house (mainly bathroom) starts to flicker.
Screenshots from Sense Lab
Sense Labs graph screenshots
Sense Labs notification Screenshots
I see almost 10 volt difference between the split phases.
I have solar, connected at 240 volt.
As is the AC, my stove, electric dryer and EVSE
No heavy load on only one of the legs of the split phase.