android: ZoomPicker ломает onTouchListener

I've got a webview which makes use of the built in zoom controls, as follows:

wv = new WebView(this);
wv.getSettings().setBuiltInZoomControls(true);

Note: this activates two main functions - pinch-to-zoom and invokeZoomPicker() (the latter is only called when a swiping action is done on the view, a simple touch doesn't enable it)

and i also want things to happen when touch events occur, using the following

wv.setOnTouchListener(new View.OnTouchListener() {  
    public boolean onTouch(View v, MotionEvent event) {
        Log.i("touch", "touched!");
        return false;
    }
});

When the WebView loads, and I tap the screen, the log states "touched" every time I interact with the screen, as expected. However, if I do something that would set off invokeZoomPicker() (pinch to zoom doesn't seem to cause this problem, as long as the zoom widget doesn't appear), onTouchListener stops responding to my taps (even after a few seconds, when the widget disappears from view).

To make sure it was invokeZoomPicker(), I edited the second segment of my code as follows:

wv.setOnTouchListener(new View.OnTouchListener() {  
    public boolean onTouch(View v, MotionEvent event) {
        wv.invokeZoomPicker();
        Log.i("touch", "touched!");
        return false;
    }
});

This new onTouch method now only triggers once (as a result of which the zoomwidget appears on the view - and disappears a few seconds later), and then the onTouch method doesn't get called again until the view is reloaded - so it is definitely a problem with the invokeZoomPicker()/Zoom widget

Have I missed some vital piece of code that allows them to coexist, or do I just have to choose which one I can live without?