Reload with setInterval stops reloading after a while

Question

I have a code similar to this (shortened it for brevity):

function reload() {
    location.reload();
}

window.addEventListener('load', function () {
    foo();
    setInterval(reload, 20 * 1000);
})

This creates an indirect loop which works fine at first, but simply stops after a while. I'm not a Javascript expert, would appreciate any explanation anyone can offer. Thanks!