In our solution, we can’t clean up this unused action because Find References claims that it is being used by some Table Columns. This may have been true in a historical version, but is no longer true. So we are unable to delete the action and remove the warning from App Health in Create.
Located the issue. When a table is changed from Edit mode TRUE (having an “On value change” action connected) to Edit mode FALSE, the “On value change” setting is hidden, but references to the action is not cleared. Fixed the references for this specific case, but we’re also registering a challenge on this one!