I am building a sensorless ESC which uses low-side shunt resistors to detect current. Good practice dictates that traces of equal length and width be connected from the pads of the shunt resistor into the microcontroller, differential amplifier, etc., like in this picture. (my FET driver has a built-in diff amp).
I did this in Altium, but since the negative terminal of the shunt resistor is connected to ground, when I added a polygon pour ground plane, Altium decided to connect the trace to the plane, like this. (I highlighted the original trace in Altium to make it obvious.)
Is there a way to avoid altium connecting the polygon pour to the trace?
Ideally the trace itself would be separate from the ground plane, but the other three sides of the solder pad (where the trace isn't) would still be connected to the ground plane.