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You are right, the plugin works incorrectly. View time when triggered "A Pos" led'
https://youtu.be/BaBQIyiBmOM

Thanks for your answer.
Yes: "General Config"->"Home Slave with Master" is not checked.
If A_axes is not slave, all 4 home swiches works good.

The manufacturer not answer.

A similar problem on two cards purchased in different places.
Slave A_axis stops along with Y_axis (switch YHome).
It is imposible to correct skew of the axis(((

Card MKX-IV. If the axis A configured slave from the Yaxes, when pressed “Ref all Home” Mach3 does not respond to the switch Ahome only switch the main axis. Don't work A axis home.
Mach3Mill.xml: ...