We have a custom field that gets updated daily via a 3rd party scheduler app. At first we set to enable Audit of the field. However later on we realized that it is not necessary to show the Audit History of this field every day the field gets updated, because
it makes the Audit History list very dirty.
So we have disabled the Audit History of this field for a few months now.
However we are very confused now that the Audit History is still showing for that field. The reason we can tell it is actually that field is because it show by the user account that runs the scheduler app, under 'Changed By' (below in screenshot I white-it
out). There is no real 'Changed Field' Old Value' and 'New Value' here which is very weird.

The field is clearly has been disabled:
Is there anywhere that could've triggered this field from being audited? This is very pesky because these hide the real Audit History that we need to look for...
Thanks in advance.
-tri