Bracing kit - CNC positioning error x-axis

Just received 200W CNC + Bracingkit. Running a flad-back mill from luban i find the position calculation for the x-axis goes way off…(maybe takes Artisian values ?)…
Easy testing: set bracing kit to ON in bios and move head as far to the right as possible–> no stop occurs… have UNset bracing kit and works oke again… (does not matter anyway since in CNC i always set 0,0,0 working position.