Crunking out X after homing

[sfcgeorge]

When doing a USB print from Cura the printer homed correctly, and then for some reason the X axis decided to keep going right (- past home) causing the motor to click until powered off.

Weird bug, I don't know why after homing the printer would allow itself to go negative on the X.

It only happened once. After a power cycle and not changing any print settings the next attempt worked fine.

(More a G2 issue but I don't see a PB fork of G2)