What is the result of deviating from the Kelvin layout when designing a current sensing PCB?
You should take the opportunity to route your sense traces so that they are as close to the same length and symmetrical as possible. Here is a mockup of what I am suggesting.



You almost want to consider the routing of these sense lines as a controlled impedance pair. The goal to be that both lines share the same common mode voltage coupling from other circuits and external influences.