Button didn't work

Questions
1

i tried this code:

<div class="block">
 <div class="row">
   <button class="button col">Button</button>
   <button class="button col">Button</button>
   <button class="button col button-round">Round</button>
 </div>
</div>

but on android, middle button cannot work

and when i tried this code:

<div class="block">
  <div class="row">
    <button class="button col">Button</button>
    <button class="button col button-round">Round</button>
  </div>
</div>

when it tap on center of button, the button is no response, but it work if tap on left part of button

thank for attention