WKWebView generating "WF: _WebFilterIsActive returning: NO" with loadHTMLString

I have a WKWebView which I load using loadHTMLString as read from a local file (on iOS). The following messages are generated in my console/log each time the view is displayed:

Code Block
WF: === Starting WebFilter logging for process
WF: _WebFilterIsActive returning: NO

Is there a way to disable these?