Z-axis not homing

Hi guys,
i’m using Arduino uno including CNC shield v3 and grbl-1.1h.20190825
to control homemade laser machine.
i have issue with z axis homing it’s working but only not homing
i have checked config.h file and z axis enable all are ok
check attachments please

console H$.txt (351 Bytes) config.txt (48.5 KB)