Why is mouseout and mouseleave always firing

Question

I really don't get why the p element is always hidden (and therefore why the mouseout is always firing):

const canvas = document.querySelector("canvas");
const infoBox = document.querySelector("#info-box")
canvas.addEventListener("mousemove", evt => {
    evt.preventDefault()
    infoBox.style.display="block"
    infoBox.style.position="absolute"
    infoBox.style.top= evt.clientY+"px"
    infoBox.style.left=evt.clientX+"px"
    console.log("moved")
})
canvas.addEventListener("mouseout", evt => {
    evt.preventDefault()
    infoBox.style.display="none"
    console.log("exit")
}, false)

canvas{
    border-width: 0px;
    border-color:#212121;
    background-color: blue;
}

<canvas></canvas>
<div id="info-box" style="display: none;"><p>Hello</p></div>