hallo, somtimes the reset bitten jumps out on my mach3, so if the mach3 ne is not driving it says something with the trigger. but only if the machine is ständig still.

Sorry dont really understand what you are meaning, can you try and make things clearer please.
Hood

Are you meaning the reset button on the screen starts flashing red at random times when the machine is idle?

Could be a loose wire in the e-stop circuit or something interfering etc, does it never do it when running?

You are suffering from a noise condition. Raise the debounce level in the general config page. Not the index debounce.