XKBSET mouse keys are errors

So, I trigger the mouse keys with the same command every time: xkbset ma 60 10 10 5 2

but every time I press /

or -

, the mouse starts to shrink.

Crash: When I use numpad to move my mouse instead of moving freely, it starts jumping down. For example, before I press the /

and keys -

, the numpad moves the mouse smoothly only a few pixels at a time ... when I hit either of those two keys, then the mouse pointer starts to move around 100 pixels.

Update
Now I notice that when I open the accessibility screen , when I press one of the two buttons, the mouse key on / off key turns on. It looks to me like this is a problem ... is there a way to prevent this?