Why is the behavior of my checkbox different on a mobile device than on a desktop PC?

I have a Blazor Wasm app that works as expected on a desktop PC but acts "strange" on a mobile device. I created a Blazor fiddle, here.
Just click the checkboxes. You will see, they act like radio buttons. That's what I want. Now,

• enter the dev tools
• emulate a mobile device (CTRL + Shift + M)
• activate checkbox "one"
• move the "cursor" not exactly to the vertical center of "one" but a little lower. Stay within "one"
• click again and see, that "one" is deselected and "two" is selected
• Do not move the cursor, click again at the exact same position and see that now "one" is selected
• click, click, click... at the exact same position toggles between "one" and "two"

What am I doing wrong? Am I even doing anything wrong? I mean, it works as expected on a desktop PC.

Edit

This is reproducible with plain HTML. Please see [here][2] (sorry, link does not work on edit. jsfiddle.net/Lrvp53gm). Just enter the dev tools, emulate a mobile device, click on the disabled "one" and see, that "two" is selected.