WebView throws Receiver not registered: android.widget.ZoomButtonsController
I don't like to answer myself, but littleFluffyKitty did not (only in comment).
Solution is in How to safely turn WebView zooming on and off as needed
a) create your own WebView class
public class MyWebView extends WebView {
b) add in it's onDestroy() method:
getSettings().setBuiltInZoomControls(true);
That's it. Thanks to that, no more of those Exceptions show up.