I use a CS-Labs IP-A and it feeds back to Mach3, if I move a motor by hand it updates the screen on mach3

As i told before the position its corect ,if it was noise ,there where some mistake between what mach think then what really
But here no ,its all corect and this very small movment you see in video ,real happen
I use step/dir pokeys ,so no any part of close loop

So the error on the mach4 screen is also moved on the machine?

yes
but its can make strange beheiviour
for example take one axis to his sof limit
so even you didnt comand this axis
you get alarm over limit

i dont know if its conect to this problem
but all this start when i start use "home in position"
and i have 6 axiss on machine( only 3 are simoltanic)
before i used max 5 and always homing by sensor
but now i chanege
not think any reason this can make that error

Is the move only if you issue some command from Mach4?

If the machine is sat idle is there any random moving?

Are the axis DRO's true to the position of the machine after a random move?

What drives and motion controller are you using?

What version of windows?

yes ,only when you give comand mdi or run gcode
yes the DRO show excatly real position
i use pokeys with servo motor caled Viechi its china made copy yaskwaw vry good
window 10
last ftp mach version
last update from site pokeys version

if machine wait  in run mode but not move ,nothing happened no any movment happened by it self

pass more then month , i sent all what mach support ask ,until now not even any help,why ? there no any one from mach can give answer?

It may be worth while asking the question on the Pokeys section of their forum;  https://forum.prosim-ar.com/viewforum.php?f=61
It's not over active but it's a chance.

Tweakie.