twice window.open but can not open a tab

[nillwyc]

A very cool project, and i found
there is a strange case when i ran project with a simple main page just like this below:

<div><button id="b2" > test2 </button></div>
<script>
b2 = document.getElementById("b2")
b2.addEventListener("click",
    (event) => {
        alert('b2')
        window.open('https://www.google.com', 'bbbddd');
    },
    false,
)
</script>

First when i clicked the button 'test2' to open a new Google tab-page, it worked;

then i closed this new-opend page by clicking the 'x' on the tab card;

so that i switched to the original simple main page;

and next, i clicked the button 'test2' again to open a new Google tab-page, BUT it can't work.

As I repeated these steps with the simple page on Chrome browser, it work well.

i found it would worked as long as using un-uniqe value on the second parm of func 'window.open' like

window.open('https://www.google.com',  'bbbddd'+new Date().getTime());

Can u help this out?