setTimeout not called in android webkit

Question

On my android phone (2.1) I'm seeing a strange behavior with setTimeout when keeping a finger pressed on the touchscreen for a while.

This very simple code in fact works fine (1 call each second), until I scroll for a while the window (2-3 seconds are sufficient), when it stops being called

$(document).ready(function(){
    spam();
});

function spam(){
    console.log("cia")
    setTimeout(spam, 1000);
}