I realized two kinds of right click menu in a page, when the left mouse button to click the space, right click menu is not hidden. So Google finally found a way to change the left-click event to:

<span style="font-size:24px;">$(document).click( function () {
}</span>

Instead of

<span style="font-size:24px;">$(document).on('click touchstart', function () {
}</span>

Problem solving.