Velocity Anti Dive -Failure

Okay, So how do i prevent velocity anti dive engaging? the check box is "un checked" but the light still comes on for the entire cut, and the THC never becomes active.

This is new with one of the recent updates. it's previously worked flawlessly for the last 6 months.
Is there a way to disable it with a Hal pin?

That will happen if the velocity during a cut never gets up to the Cut Feed Rate for the selected material.

It needs to get to that feed rate to sample the voltage for THC.

There has been no recent work that would affect this. As far as my shrinking brain can remember anyhow. 

so to clarify, turning it on and off does nothing. correct?

Only if the velocity never reaches the required velocity to start THC.

If the velocity at some stage reaches the required velocity then THC will activate, then if the velocity falls below the threshold percentage THC will deactivate. It will stay deactivated until the required velocity is reached again.

so why is there a button to turn it on and off?