You would seem to have a bouncing switch on the Y, what would seem to be happening is axis moves, hits switch, Mach sees that so starts to reverse but because switch is bouncing on the contacts Mach sees it close again then it opens and Mach sees that as an E-Stop.
Setting some Debounce Interval on General Config page may help, try 2000 then work down if it helps. But having said that debounce is masking the issue rather than curing it so often better to sort the switch out.
Hood