May I add the following for an explanation of the problem (now solved, apparently). Menus, tooltips etc. not hiding after a tap somewhere on the screen typically is a focus problem with iOS.
You can solve it by having the following at the end of the body section of the page:
Code:
var eventList = ["click", "touchstart"];
for(event of eventList) {
document.body.addEventListener(event, function(e) {
if(e.target.id!=='YOUR_MAIN_MENU_BUTTON(S) OR TOOLTIP'){setTimeout(function () {YOUT_HIDE_INSTRUCTION}, 0);}
});
}
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